hepatic necrosis is the most serious adverse effect. Renal tubular necrosis, hypoglycemic coma, and thrombocytopenia may occur. Early symptoms of hepatotoxicity include nausea, vomiting, diaphoresis, and general malaise. Clinical and laboratory evidence of hepatic toxicity may not be apparent until 48 to 72 hours after ingestion. Acute caffeine poisoning may cause insomnia, restlessness, tremor, delirium, tachycardia, extrasystoles, and seizures.
Because overdose information on this combination product is limited, it is unclear which of the signs and symptoms of toxicity would manifest in any particular overdose situation.
Treatment:
Immediate treatment of an overdosage of Acetaminophen, caffeine, and dihydrocodeine bitartrate tablets includes support of cardiorespiratory function and measures to reduce drug absorption. Vomiting should be induced with syrup of ipecac, if the patient is alert and has adequate laryngeal reflexes. Oral activated charcoal should follow. The first dose of charcoal should be accompanied by an appropriate cathartic. Gastric lavage may be necessary. Hypotension is usually hypovolemic and should be treated with fluids. Endotracheal intubation and artificial respiration may be necessary. Peritoneal or hemodialysis may be necessary. If hypoprothrombinemia occurs, Vitamin K should be administered.
A pure opioid antagonist, such as naloxone or nalmefene, is a specific antidote against respiratory depression which results from opioid overdose. Opioid antagonists should not be given in the absence of clinically significant respiratory or circulatory depression secondary to opioid overdose. They should be administered cautiously to persons who are known, or suspected to be, physically dependent on any opioid agonist including Acetaminophen, caffeine, and dihydrocodeine bitartrate tablets. In such cases, an abrupt or complete reversal of opioid effects may precipitate an acute abstinence syndrome. The prescribing information for the specific opioid antagonist should be consulted for details of their proper use.
In adults and adolescents, regardless of the quantity of acetaminophen reported to have been ingested, acetylcysteine should be administered immediately if 24 hours or less have elapsed from the reported time of ingestion. It is not advisable to await the plasma concentration determination of acetaminophen before administering acetylcysteine. Serum liver enzyme levels should be measured. Therapy in children involves a similar treatment scheme; however, a regional Poison Control Center should be contacted. No specific antidote is available for caffeine. In addition to the supportive measures above, administration of demulcents such as aluminum hydroxide gel may diminish gastrointestinal irritation. Seizures may be treated with intravenous diazepam or a barbiturate.
DOSAGE AND ADMINISTRATION
The usual adult dosage is one (1) Acetaminophen, caffeine, and dihydrocodeine bitartrate tablets orally every four (4) hours, as needed. Dosage should be adjusted according to the severity of the pain and the response of the patient. No more than one (1) tablet should be taken in a 4-hour period. No more than five (5) doses, or five (5) tablets should be taken in a 24-hour period.
HOW SUPPLIED:
Acetaminophen, caffeine, and dihydrocodeine bitartrate tablets, containing acetaminophen 712.8 mg, caffeine 60 mg and dihydrocodeine* bitartrate 32 mg (*Warning: May be habit-formin
