Tapentadol Drug Information

Important Dosage and

Administration Instructions Tapentadol extended-release tablets should be prescribed only by healthcare professionals who are knowledgeable about the use of extended-release/long-acting opioids and how to mitigate the associated risks. Use the lowest effective dosage for the shortest duration of time consistent with individual patient treatment goals . Because the risk of overdose increases as opioid doses increase, reserve titration to higher doses of tapentadol extended-release tablets for patients in whom lower doses are insufficiently effective and in whom the expected benefits of using a higher dose opioid clearly outweigh the substantial risks. Initiate the dosing regimen for each patient individually, taking into account the patient's underlying cause and severity of pain, prior analgesic treatment and response, and risk factors for addiction, abuse, and misuse.

Respiratory depression can occur at any time during opioid therapy, especially when initiating and following dosage increases with tapentadol extended-release tablets. Consider this risk when selecting an initial dose and when making dose adjustments . Instruct patients to swallow tapentadol extended-release tablets whole, one tablet at a time, with enough water to ensure complete swallowing immediately after placing in the mouth. Crushing, chewing, or dissolving tapentadol extended-release tablets will result in uncontrolled delivery of tapentadol and can lead to overdose or death.

Discontinue all other tapentadol and tramadol products when beginning and while taking tapentadol extended-release tablets . Although the maximum approved total daily dose of tapentadol immediate-release formulation is 600 mg per day, the maximum total daily dose of tapentadol extended-release tablets is 500 mg. Do not exceed a total daily dose of tapentadol extended-release tablets of 500 mg.

Patient Access to Naloxone for the Emergency Treatment of Opioid Overdose Discuss

the availability of naloxone for the emergency treatment of opioid overdose with the patient and caregiver and assess the potential need for access to naloxone, both when initiating and renewing treatment with tapentadol extended-release tablets. Inform patients and caregivers about the various ways to obtain naloxone as permitted by individual state naloxone dispensing and prescribing requirements or guidelines (e.g., by prescription, directly from a pharmacist, or as part of a community-based program). Consider prescribing naloxone, based on the patient's risk factors for overdose, such as concomitant use of CNS depressants, a history of opioid use disorder, or prior opioid overdose. The presence of risk factors for overdose should not prevent the proper management of pain in any given patient.

Consider prescribing naloxone if the patient has household members (including children) or other close contacts at risk for accidental ingestion or overdose.

Initial Dosage Use of tapentadol extended-release tablets as the First Opioid Analgesic

(opioid-naïve patients) Initiate treatment with tapentadol extended-release tablets with the 50 mg tablet orally twice daily (approximately every 12 hours). Use of tapentadol extended-release tablets in Patients who are not Opioid Tolerant The starting dose for patients who are not opioid tolerant is tapentadol extended-release tablet 50 mg orally twice daily (approximately every 12 hours). Use of higher starting doses in patients who are not opioid tolerant may cause fatal respiratory depression. Conversion from tapentadol to tapentadol extended-release tablets Patients can be converted from tapentadol to tapentadol extended-release tablets using the equivalent total daily dose of tapentadol and dividing it into two equal doses of tapentadol extended-release tablet separated by approximately 12-hour intervals. As an example, a patient receiving 50 mg of tapentadol four times per day (200 mg/day) may be converted to 100 mg tapentadol extended-release tablet twice a day.

Conversion from Other Opioids to tapentadol extended-release tablet When tapentadol extended-release tablet therapy is initiated, discontinue all other opioid analgesics other than those used on an as needed basis for breakthrough pain when appropriate. There are no established conversion ratios for conversion from other opioids to tapentadol extended-release tablets defined by clinical trials. Initiate dosing using tapentadol extended-release tablet 50 mg orally every 12 hours.

It is safer to underestimate a patient's 24-hour oral tapentadol dosage and provide rescue medication (e.g., immediate-release opioid) than to overestimate the 24-hour oral tapentadol requirements which could result in an adverse reaction due to an overdose. While useful tables of opioid equivalents are readily available, there is inter-patient variability in the potency of opioid drugs and opioid formulations. Close observation and frequent titration are warranted until pain management is stable on the new opioid.

Frequently evaluate patients for signs and symptoms of opioid withdrawal and for signs of oversedation/toxicity after converting patients to tapentadol extended-release tablets. Conversion from Methadone to tapentadol extended-release tablets Frequent evaluation is of particular importance when converting from methadone to other opioid agonists. The ratio between methadone and other opioid agonists may vary widely as a function of previous dose exposure.

Methadone has a long half-life and can accumulate in the plasma.

Titration and Maintenance of Therapy Individually titrate tapentadol extended-release tablets to a

dose that provides adequate analgesia and minimizes adverse reactions. Continually reevaluate patients receiving tapentadol extended-release tablets to assess the maintenance of pain control, signs and symptoms of opioid withdrawal, and other adverse reactions, as well as to reassess for the development of addiction, abuse, or misuse . Frequent communication is important among the prescriber, other members of the healthcare team, the patient, and the caregiver/family during periods of changing analgesic requirements, including initial titration. During use of opioid therapy for an extended period of time, periodically reassess the continued need for opioid analgesics.

Patients who experience breakthrough pain may require a dosage adjustment of tapentadol extended-release tablets or may need rescue medication with an appropriate dose of an immediate-release analgesic. If the level of pain increases after dose stabilization, attempt to identify the source of increased pain before increasing the tapentadol extended-release tablet dosage. If after increasing the dosage, unacceptable opioid-related adverse reactions are observed (including an increase in pain after a dosage increase), consider reducing the dosage . Adjust the dosage to obtain an appropriate balance between management of pain and opioid-related adverse reactions.

Titrate patients to adequate analgesia with dose increases of 50 mg no more than twice daily every three days. In clinical studies, efficacy with tapentadol extended-release tablets was demonstrated relative to placebo in the dosage range of 100 mg to 250 mg twice daily .

Dosage Modification in Patients with Hepatic Impairment

The use of tapentadol extended-release tablets in patients with severe hepatic impairment (Child-Pugh Score 10-15) is not recommended . In patients with moderate hepatic impairment (Child-Pugh Score 7 to 9), initiate treatment using 50 mg tapentadol extended-release tablets, administer no more frequently than once every 24 hours, and regularly evaluate for respiratory and central nervous system depression, particularly during initiation and titration of tapentadol extended-release tablets. The maximum recommended dose for patients with moderate hepatic impairment is 100 mg of tapentadol extended-release tablets per day. Regularly evaluate patients for respiratory and central nervous system depression . No dosage adjustment is recommended in patients with mild hepatic impairment (Child-Pugh Score 5 to 6).

Safe Reduction or Discontinuation of tapentadol extended-release tablets Do not abruptly discontinue

tapentadol extended-release tablets in patients who may be physically dependent on opioids. Rapid discontinuation of opioid analgesics in patients who are physically dependent on opioids has resulted in serious withdrawal symptoms, uncontrolled pain, and suicide. Rapid discontinuation has also been associated with attempts to find other sources of opioid analgesics, which may be confused with drug-seeking for abuse.

Patients may also attempt to treat their pain or withdrawal symptoms with illicit opioids, such as heroin, and other substances. When a decision has been made to decrease the dose or discontinue therapy in an opioid-dependent patient taking tapentadol extended-release tablets, there are a variety of factors that should be considered, including the total daily dose of opioid (including tapentadol extended-release tablets) the patient has been taking, the duration of treatment, the type of pain being treated, and the physical and psychological attributes of the patient. It is important to ensure ongoing care of the patient and to agree on an appropriate tapering schedule and follow-up plan so that patient and provider goals and expectations are clear and realistic.

When opioid analgesics are being discontinued due to a suspected substance use disorder, evaluate and treat the patient, or refer for evaluation and treatment of the substance use disorder. Treatment should include evidence-based approaches, such as medication assisted treatment of opioid use disorder. Complex patients with co-morbid pain and substance use disorders may benefit from referral to a specialist.

There are no standard opioid tapering schedules that are suitable for all patients. Good clinical practice dictates a patient-specific plan to taper the dose of the opioid gradually. For patients on tapentadol extended-release tablets who are physically opioid-dependent, initiate the taper by a small enough increment (e.g., no greater than 10% to 25% of the total daily dose) to avoid withdrawal symptoms, and proceed with dose-lowering at an interval of every 2 to 4 weeks.

Patients who have been taking opioids for briefer periods of time may tolerate a more rapid taper. It may be necessary to provide the patient with lower dosage strengths to accomplish a successful taper. Reassess the patient frequently to manage pain and withdrawal symptoms, should they emerge.

Common withdrawal symptoms include restlessness, lacrimation, rhinorrhea, yawning, perspiration, chills, myalgia, and mydriasis. Other signs and symptoms also may develop, including irritability, anxiety, backache, joint pain, weakness, abdominal cramps, insomnia, nausea, anorexia, vomiting, diarrhea, or increased blood pressure, respiratory rate, or heart rate. If withdrawal symptoms arise, it may be necessary to pause the taper for a period of time or raise the dose of the opioid analgesic to the previous dose, and then proceed with a slower taper.

In addition, evaluate patients for any changes in mood, emergence of suicidal thoughts, or use of other substances. When managing patients taking opioid analgesics, particularly those who have been treated for an extended period of time and/or with high doses for chronic pain, ensure that a multimodal approach to pain management, including mental health support (if needed), is in place prior to initiating an opioid analgesic taper. A multimodal approach to pain management may optimize the treatment of chronic pain, as well as assist with the successful tapering of the opioid analgesic.

Clinical Trial Experience

Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared to rates in the clinical trials of another drug and may not reflect the rates observed in clinical practice. Commonly-Observed Adverse Reactions in Clinical Studies with tapentadol extended-release tablets in Patients with Chronic Pain due to Low Back Pain or Osteoarthritis The safety data described in Table 1 below are based on three pooled, randomized, double-blind, placebo-controlled, parallel group, 15-week studies of tapentadol extended-release tablets (dosed 100 to 250 mg BID after a 50 mg BID starting dose) in patients with chronic pain due to low back pain (LBP) and osteoarthritis (OA). These trials included 980 tapentadol extended-release tablet-treated patients and 993 placebo-treated patients. The mean age was 57 years old; 63% were female and 37% were male; 83% were White, 10% were Black, and 5% were Hispanic.

The most common adverse reactions (reported by ≥10% in any tapentadol extended-release tablet dose group) were: nausea, constipation, dizziness, headache, and somnolence. The most common reasons for discontinuation due to adverse reactions in eight Phase 2/3 pooled studies reported by ≥1% in any tapentadol extended-release tablet dose group for tapentadol extended-release tablet- and placebo-treated patients were nausea (4% vs. 1%), dizziness (3% vs. <1%), vomiting (3% vs. <1%), somnolence (2% vs. <1%), constipation (1% vs. <1%), headache (1% vs. <1%), and fatigue (1% vs. <1%), respectively. Table 1. Adverse Drug Reactions Reported by ≥ 1% of tapentadol extended-release tablet-Treated Patients and Greater than Placebo-Treated Patients in Pooled Parallel-Group Trials MedDRA preferred terms.

The trials included forced titration during the first week of dosing. Tapentadol extended-release tablets 50 to 250 mg BID Tapentadol extended-release tablet dosed between 100 and 250 mg BID after a starting dose of 50 mg BID (n=980) Placebo (n=993) Nausea 21% 7% Constipation 17% 7% Dizziness 17% 6% Headache 15% 13% Somnolence 12% 4% Fatigue 9% 4% Vomiting 8% 3% Dry mouth 7% 2% Hyperhidrosis 5% <1% Pruritus 5% 2% Insomnia 4% 2% Dyspepsia 3% 2% Lethargy 2% <1% Asthenia 2% <1% Anxiety 2% 1% Decreased appetite 2% <1% Vertigo 2% <1% Hot flush 2% <1% Disturbance in attention 1% <1% Tremor 1% <1% Chills 1% 0% Abnormal dreams 1% <1% Depression 1% <1% Vision blurred 1% <1% Erectile dysfunction 1% <1% Commonly-Observed Adverse Reactions in Clinical Studies with tapentadol extended-release tablets in Patients with Neuropathic Pain Associated with Diabetic Peripheral Neuropathy The types of adverse reactions seen in the studies of patients with painful diabetic peripheral neuropathy (DPN) were similar to what was seen in the low back pain and osteoarthritis trials. The safety data described in Table 2 below are based on two pooled, randomized withdrawal, double-blind, placebo-controlled, 12-week studies of tapentadol extended-release tablets (dosed 100 to 250 mg BID) in patients with neuropathic pain associated with diabetic peripheral neuropathy.

These trials included 1040 tapentadol extended-release tablet-treated patients and 343 placebo-treated patients. The mean age was 60 years old; 40% were female and 60% were male; 76% were White, 12% were Black, and 12% were "Other". The most commonly reported ADRs (incidence ≥10% in tapentadol extended-release tablet-treated subjects) were: nausea, constipation, vomiting, dizziness, somnolence, and headache. Table 2 lists the common adverse reactions reported in 1% or more of tapentadol extended-release tablet-treated patients and greater than placebo-treated patients with neuropathic pain associated with diabetic peripheral neuropathy in the two pooled studies.

Table 2. Adverse Drug Reactions Reported by ≥ 1% of tapentadol extended-release tablet-Treated Patients and Greater than Placebo-Treated Patients in Pooled Trials (Studies DPN-1 and DPN-2) MedDRA preferred terms. Tapentadol extended-release tablets 50 to 250 mg BID Tapentadol extended-release tablets dosed between 100 and 250 mg BID after a starting dose of 50 mg BID. It includes ADR reported in the open-label titration period for all subjects and in the double-blind maintenance period for the subjects who were randomized to tapentadol extended-release tablet. (n=1040) Placebo It includes ADR reported in the double-blind maintenance period for the subjects who were randomized to placebo after receiving tapentadol extended-release tablets during the open-label titration period. (n=343) Nausea 27% 8% Dizziness 18% 2% Somnolence 14% <1% Constipation 13% <1% Vomiting 12% 3% Headache 10% 5% Fatigue 9% <1% Pruritus 8% 0% Dry mouth 7% <1% Diarrhea 7% 5% Decreased appetite 6% <1% Anxiety 5% 4% Insomnia 4% 3% Hyperhidrosis 3% 2% Hot flush 3% 2% Tremor Tremor was observed in 3.4% of tapentadol extended-release tablet-treated subjects vs. 3.2% in placebo group, chills in 1.3% vs.1.2% in placebo, and feeling cold- in 1.3% vs.1.2% in placebo. 3% 3% Abnormal dreams 2% 0% Lethargy 2% 0% Asthenia 2% <1% Irritability 2% 1% Dyspnea 1% 0% Nervousness 1% 0% Sedation 1% 0% Vision blurred 1% 0% Pruritus generalized 1% 0% Vertigo 1% <1% Abdominal discomfort 1% <1% Hypotension 1% <1% Dyspepsia 1% <1% Hypoesthesia 1% <1% Depression 1% <1% Rash 1% <1% Chills 1% 1% Feeling cold 1% 1% Drug withdrawal syndrome 1% <1% Other Adverse Reactions Observed During the Premarketing Evaluation of tapentadol extended-release tablets The following additional adverse drug reactions occurred in less than 1% of tapentadol extended-release tablet-treated patients in ten Phase 2/3 clinical studies: Nervous system disorders: paresthesia, balance disorder, syncope, memory impairment, mental impairment, depressed level of consciousness, dysarthria, presyncope, coordination abnormal Gastrointestinal disorders: impaired gastric emptying General disorders and administration site conditions: feeling abnormal, feeling drunk Psychiatric disorders: perception disturbances, disorientation, confusional state, agitation, euphoric mood, drug dependence, thinking abnormal, nightmare Skin and subcutaneous tissue disorders: urticaria Metabolism and nutrition disorders: weight decreased Cardiac disorders: heart rate increased, palpitations, heart rate decreased, left bundle branch block Vascular disorder: blood pressure decreased Respiratory, thoracic and mediastinal disorders: respiratory depression Renal and urinary disorders: urinary hesitation, pollakiuria Reproductive system and breast disorders: sexual dysfunction Eye disorders: visual disturbance Immune system disorders: drug hypersensitivity

Postmarketing Experience

The following adverse reactions have been identified during post approval use of tapentadol. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure. Psychiatric disorders: hallucination, suicidal ideation, panic attack Serotonin syndrome: Cases of serotonin syndrome, a potentially life-threatening condition, have been reported during concomitant use of opioids with serotonergic drugs.

Adrenal insufficiency: Cases of adrenal insufficiency have been reported with opioid use, more often following greater than one month of use. Anaphylaxis: Anaphylaxis has been reported with ingredients contained in tapentadol extended-release tablet. Androgen deficiency: Cases of androgen deficiency have occurred with use of opioids for an extended period of time . Hyperalgesia and Allodynia: Cases of hyperalgesia and allodynia have been reported with opioid therapy of any duration.

Hypoglycemia: Cases of hypoglycemia have been reported in patients taking opioids. Most reports were in patients with at least one predisposing risk factor (e.g., diabetes).

Table 3 includes clinically significant drug interactions with tapentadol extended-release tablets. Table 3. Clinically Significant Drug Interactions with tapentadol extended-release tablets Alcohol Clinical Impact: Concomitant use of alcohol with tapentadol extended-release tablets can result in an increase of tapentadol plasma levels and potentially fatal overdose of tapentadol. Intervention: Instruct patients not to consume alcoholic beverages or use prescription or non-prescription products containing alcohol while on tapentadol extended-release tablet therapy . Benzodiazepines and Other Central Nervous System (CNS) Depressants Clinical Impact: Due to additive pharmacologic effect, the concomitant use of benzodiazepines or other CNS depressants, including alcohol, can increase the risk of hypotension, respiratory depression, profound sedation, coma, and death . Intervention: Reserve concomitant prescribing of these drugs for use in patients for whom alternative treatment options are inadequate.

Limit dosages and durations to the minimum required. Inform patients and caregivers of this potential interaction and educate them on the signs and symptoms of respiratory depression (including sedation). If concomitant use is warranted, consider prescribing naloxone for the emergency treatment of opioid overdose. Examples: Benzodiazepines and other sedatives/hypnotics, anxiolytics, tranquilizers, muscle relaxants, general anesthetics, antipsychotics, other opioids, alcohol Serotonergic Drugs Clinical Impact: The concomitant use of opioids with other drugs that affect the serotonergic neurotransmitter system has resulted in serotonin syndrome.

Intervention: If concomitant use is warranted, frequently evaluate the patient, particularly during treatment initiation and dose adjustment. Discontinue tapentadol extended-release tablet if serotonin syndrome is suspected. Examples: Selective serotonin reuptake inhibitors (SSRIs), serotonin and norepinephrine reuptake inhibitors (SNRIs), tricyclic antidepressants (TCAs), triptans, 5-HT3 receptor antagonists, drugs that affect the serotonin neurotransmitter system (e.g., mirtazapine, trazodone, tramadol), certain muscle relaxants (i.e., cyclobenzaprine, metaxalone), monoamine oxidase (MAO) inhibitors (those intended to treat psychiatric disorders and also others, such as linezolid and intravenous methylene blue) Monoamine Oxidase Inhibitors (MAOIs) Clinical Impact: MAOI interactions with opioids may manifest as serotonin syndrome or opioid toxicity (e.g., respiratory depression, coma). Intervention: Do not use tapentadol extended-release tablet in patients taking MAOIs or within 14 days of stopping such treatment.

Examples: phenelzine, tranylcypromine, linezolid Mixed Agonist/Antagonist and Partial Agonist Opioid Analgesics Clinical Impact: May reduce the analgesic effect of tapentadol extended-release tablets and/or precipitate withdrawal symptoms. Intervention: Avoid concomitant use. Examples: butorphanol, nalbuphine, pentazocine, buprenorphine Muscle Relaxants Clinical Impact: Tapentadol may enhance the neuromuscular blocking action of skeletal muscle relaxants and produce an increased degree of respiratory depression.

Intervention: Because respiratory depression may be greater than otherwise expected, decrease the dosage of tapentadol extended-release tablets and/or the muscle relaxant as necessary. Due to the risk of respiratory depression with concomitant use of skeletal muscle relaxants and opioids, consider prescribing naloxone for the emergency treatment of opioid overdose Examples: cyclobenzaprine, metaxalone Diuretics Clinical Impact: Opioids can reduce the efficacy of diuretics by inducing the release of antidiuretic hormone. Intervention: Evaluate patients for signs of diminished diuresis and/or effects on blood pressure and increase the dosage of the diuretic as needed.

Anticholinergic Drugs Clinical Impact: The concomitant use of anticholinergic drugs may increase risk of urinary retention and/or severe constipation, which may lead to paralytic ileus. Intervention: Evaluate patients for signs of urinary retention or reduced gastric motility when tapentadol extended-release tablets are used concomitantly with anticholinergic drugs. Mixed Agonist/Antagonist and Partial Agonist Opioid Analgesics : Avoid use with tapentadol extended-release tablets because they may reduce analgesic effect of tapentadol extended-release tablets or precipitate withdrawal symptoms.

Pregnancy Risk Summary Use of opioid analgesics for an extended period of time during pregnancy may cause neonatal opioid withdrawal syndrome. Available data with tapentadol extended-release tablets are insufficient to inform a drug-associated risk for major birth defects and miscarriage or adverse maternal outcomes. In animal reproduction studies, embryofetal mortality and structural malformations were observed with subcutaneous administration of tapentadol during organogenesis to rabbits and delays in skeletal maturation were observed in rats at exposures equivalent to and less than the maximum recommended human dose (MRHD), respectively.

When administered to pregnant rats during organogenesis and through lactation, increased pup mortality was noted following oral tapentadol exposures to doses equivalent to the MRHD . Based on animal data, advise pregnant women of the potential risk to a fetus. The background risk of major birth defects and miscarriage for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss, or other adverse reaction.

In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2 to 4% and 15 to 20%, respectively. Clinical Considerations Fetal/neonatal adverse reactions Use of opioid analgesics for an extended period of time during pregnancy for medical or nonmedical purposes can result in physical dependence in the neonate and neonatal opioid withdrawal syndrome shortly after birth. Neonatal opioid withdrawal syndrome presents as irritability, hyperactivity and abnormal sleep pattern, high pitched cry, tremor, vomiting, diarrhea, and failure to gain weight.

The onset, duration, and severity of neonatal opioid withdrawal syndrome vary based on the specific opioid used, duration of use, timing and amount of last maternal use, and rate of elimination of the drug by the newborn. Observe newborns for symptoms of neonatal opioid withdrawal syndrome and manage accordingly. Labor or Delivery Opioids cross the placenta and may produce respiratory depression and psychophysiological effects in neonates.

An opioid antagonist, such as naloxone, must be available for reversal of opioid-induced respiratory depression in the neonate. tapentadol extended-release tablets are not recommended for use in pregnant women during and immediately prior to labor, when use of shorter-acting analgesics or other analgesic techniques are more appropriate. Opioid analgesics, including tapentadol extended-release tablets, can prolong labor through actions that temporarily reduce the strength, duration, and frequency of uterine contractions. However, this effect is not consistent and may be offset by an increased rate of cervical dilatation, which tends to shorten labor.

Monitor neonates exposed to opioid analgesics during labor for signs of excess sedation and respiratory depression. Data Animal Data Tapentadol HCl was evaluated for teratogenic effects in pregnant rats and rabbits following intravenous and subcutaneous exposure during the period of embryofetal organogenesis. When tapentadol was administered twice daily by the subcutaneous route in rats at dose levels of 10, 20, or 40 mg/kg/day, no teratogenic effects were observed.

Evidence of embryofetal toxicity included transient delays in skeletal maturation (i.e., reduced ossification) at the 40 mg/kg/day dose which was associated with significant maternal toxicity. Administration of tapentadol HCl in rabbits at doses of 4, 10, or 24 mg/kg/day by subcutaneous injection revealed embryofetal toxicity at doses ≥10 mg/kg/day. Findings included reduced fetal viability, skeletal delays and other variations.

In addition, there were multiple malformations including gastroschisis/thoracogastroschisis, amelia/phocomelia, and cleft palate at doses ≥10 mg/kg/day and above, and ablepharia, encephalopathy, and spina bifida at the high dose of 24 mg/kg/day. Embryofetal toxicity, including malformations, may be secondary to the significant maternal toxicity observed in the study. In a study of pre- and postnatal development in rats, oral administration of tapentadol at doses of 20, 50, 150, or 300 mg/kg/day to pregnant and lactating rats during the late gestation and early postnatal period did not influence physical or reflex development, the outcome of neurobehavioral tests or reproductive parameters.

At maternal tapentadol doses ≥150 mg/kg/day, a dose-related increase in pup mortality was observed to postnatal Day 4. Treatment-related developmental delay was observed in the dead pups, including incomplete ossification. In addition, significant reductions in pup body weights and body weight gains at doses associated with maternal toxicity (150 mg/kg/day and above) were seen throughout lactation.

Pediatric Use The safety and efficacy of tapentadol extended-release tablets in pediatric patients less than 18 years of age have not been established.

Tapentadol extended-release tablets are contraindicated in patients with: Significant respiratory depression Acute or severe bronchial asthma or hypercarbia in an unmonitored setting or in the absence of resuscitative equipment Known or suspected gastrointestinal obstruction, including paralytic ileus Hypersensitivity (e.g., anaphylaxis, angioedema) to tapentadol or to any other ingredients of the product Concurrent use of monoamine oxidase inhibitors (MAOIs) or use of MAOIs within the last 14 days Significant respiratory depression Acute or severe bronchial asthma Known or suspected paralytic ileus Hypersensitivity to tapentadol or to any other ingredients of the product Concurrent use of monoamine oxidase inhibitors (MAOIs) or use of MAOIs within the last 14 days.

Clinical Presentation Acute overdosage with tapentadol can be manifested by respiratory depression, somnolence progressing to stupor or coma, skeletal muscle flaccidity, cold and clammy skin, constricted pupils, and, in some cases pulmonary edema, bradycardia, hypotension, hypoglycemia, partial or complete airway obstruction, atypical snoring and death. Marked mydriasis rather than miosis may be seen with hypoxia in overdose situations . Treatment of Overdose In case of overdose, priorities are the reestablishment of a patent and protected airway and institution of assisted or controlled ventilation, if needed. Employ other supportive measures (including oxygen, vasopressors) in the management of circulatory shock and pulmonary edema as indicated.

Cardiac arrest or arrhythmias will require advanced life support measures. Opioid antagonists, such as naloxone, are specific antidotes to respiratory depression resulting from opioid overdose. For clinically significant respiratory or circulatory depression secondary to tapentadol overdose, administer an opioid antagonist.

Because the duration of reversal would be expected to be less than the duration of action of tapentadol in tapentadol extended-release tablets, carefully monitor the patient until spontaneous respiration is reliably reestablished. Tapentadol extended-release tablets will continue to release tapentadol and add to the tapentadol load for 24 to 48 hours or longer following ingestion, necessitating prolonged monitoring. If the response to an opioid antagonist is suboptimal or only brief in nature, additional antagonist should be given as directed in the product's prescribing information.

In an individual physically dependent on opioids, administration of the recommended usual dosage of the antagonist will precipitate an acute withdrawal syndrome. The severity of the withdrawal symptoms experienced will depend on the degree of physical dependence and the dose of the antagonist administered. If a decision is made to treat serious respiratory depression in the physically dependent patient, administration of the antagonist should be initiated with care and by titration with smaller than usual doses of the antagonist.