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Clinical experience with TALACEN has been insufficient to define all possible adverse reactions with this combination. However, reactions reported after oral administration of pentazocine hydrochloride in 50 mg dosage include the following:
Respiratory: rarely respiratory depression,
Acute CNS Manifestations: Hallucinations (usually visual), disorientation, and confusion
Other CNS effects: grand mal convulsions, increase in intracranial pressure, dizziness, lightheadedness, hallucinations, sedation, euphoria, headache, confusion, disorientation; infrequently weakness, disturbed dreams, insomnia, syncope, and depression; and rarely tremor, irritability, excitement, tinnitus.
Autonomic: sweating; infrequently flushing; and rarely chills.
Ophthalmic: visual blurring and focusing difficulty, miosis.
Other: urinary retention, paresthesia, serious skin reactions, including erythema multiforme, Stevens-Johnson Syndrome, toxic epidermal necrolysis, and alterations in rate or strength of uterine contractions during labor.
Numerous clinical studies have shown that acetaminophen, when taken in recommended doses, is relatively free of adverse effects in most age groups, even in the presence of a variety of disease states.
A few cases of hypersensitivity to acetaminophen have been reported, as manifested by skin rashes, thrombocytopenic purpura, rarely hemolytic anemia and agranulocytosis. Occasional individuals respond to ordinary doses with nausea and vomiting and diarrhea.
Read the Talacen (pentazocine and acetaminophen) Side Effects Center for a complete guide to possible side effects
Other central nervous system (CNS) depressants including sedatives, hypnotics, general anesthetics, antiemetics, phenothiazines, or other tranquilizers or alcohol increases the risk of respiratory depression, hypotension, profound sedation, or coma. Use morphine sulfate with caution and in reduced dosages in patients taking these agents.
Opioid Agonist Analgesics
Monoamine Oxidase Inhibitors (MAOIs)
Concomitant use of monoamine oxidase inhibitors (MAOIs) with TALACEN may cause CNS excitation and hypertension through their respective effects on catecholamines. Caution should therefore be observed in administering TALACEN to patients who are currently receiving MAOIs or who have received them within the preceding 14 days.
Anticholinergics or other medications with anticholinergic activity when used concurrently with opioid analgesics may result in increased risk of urinary retention and/or severe constipation, which may lead to paralytic ileus.
Smoking tobacco could enhance the metabolic clearance rate of pentazocine reducing the clinical effectiveness of a standard dose of pentazocine.
Read the Talacen Drug Interactions Center for a complete guide to possible interactions
Last reviewed on RxList: 5/2/2011
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