Sunday, January 20, 2008

Acetaminophen, aspirin, and caffeine

U.S. BRAND NAMES — Excedrin® Extra Strength [OTC]; Excedrin® Migraine [OTC]; Fem-Prin® [OTC]; Genaced™ [OTC]; Goody's® Extra Strength Headache Powder [OTC]; Goody's® Extra Strength Pain Relief [OTC]; Pain-Off [OTC]; Vanquish® Extra Strength Pain Reliever [OTC]
PHARMACOLOGIC CATEGORY Analgesic, Miscellaneous
DOSING: ADULTS Pain management: Based on acetaminophen component: Mild-to-moderate pain: Oral: 325-650 mg every 4-6 hours as needed; do not exceed 4 g/day Mild-to-moderate pain associated with migraine headache: Oral: 500 mg/dose (in combination with 500 mg aspirin and 130 mg caffeine) every 6 hours while symptoms persist; do not use for longer than 48 hours Based on aspirin component: Mild-to-moderate pain: Oral: 325-650 mg every 4-6 hours as needed; do not exceed 4 g/day Mild-to-moderate pain associated with migraine headache: Oral: 500 mg/dose (in combination with 500 mg acetaminophen and 130 mg caffeine) every 6 hours; do not use for longer than 48 hours
Product labeling:
Excedrin® Extra Strength, Excedrin® Migraine: Oral: 2 doses every 6 hours (maximum: 8 doses/24 hours) Note: When used for migraine, do not use for longer than 48 hours
Goody's® Extra Strength Headache Powder: Oral: 1 powder, placed on tongue or dissolved in water, every 4-6 hours (maximum: 4 powders/24 hours)
Goody's® Extra Strength Pain Relief Tablets: Oral: 2 tablets every 4-6 hours (maximum: 8 tablets/24 hours)
Vanquish® Extra Strength Pain Reliever: Oral: 2 tablets every 4 hours (maximum: 12 tablets/24 hours)
DOSING: PEDIATRIC Product labeling:
Excedrin® Extra Strength, Excedrin® Migraine: Oral: Children >12 years: Refer to adult dosing
Goody's® Extra Strength Headache Powder: Oral: Children >12 years: Refer to adult dosing
Goody's® Extra Strength Pain Relief Tablets: Oral: Children >12 years: Refer to adult dosing
Vanquish® Extra Strength Pain Reliever: Oral: Children >12 years: Refer to adult dosing
DOSING: ELDERLY — Refer to adult dosing.
DOSING: HEPATIC IMPAIRMENT — Use with caution. Limited, low-dose therapy usually well tolerated in hepatic disease/cirrhosis. However, cases of hepatotoxicity at daily acetaminophen dosages <4 g/day have been reported. Avoid chronic use in hepatic impairment.
DOSAGE FORMS — Excipient information presented when available (limited, particularly for generics); consult specific product labeling.
Caplet: Excedrin® Extra Strength, Excedrin® Migraine: Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg Vanquish® Extra Strength Pain Reliever: Acetaminophen 194 mg, aspirin 227 mg, and caffeine 33 mg
Geltab (Excedrin® Extra Strength, Excedrin® Migraine): Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg
Powder (Goody's® Extra Strength Headache Powder): Acetaminophen 260 mg, aspirin 520 mg, and caffeine 32.5 mg [contains lactose]
Tablet: Excedrin® Extra Strength, Excedrin® Migraine, Genaced™, Pain-Off: Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg Fem-Prin®: Acetaminophen 194.4 mg, aspirin 226.8 mg, and caffeine 32.4 mg Goody's® Extra Strength Pain Relief: Acetaminophen 130 mg, aspirin 260 mg, and caffeine 16.25 mg
DOSAGE FORMS: CONCISE Caplet: Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg; acetaminophen 194 mg, aspirin 227 mg, and caffeine 33 mg Excedrin® Extra Strength [OTC], Excedrin® Migraine [OTC]: Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg Vanquish® Extra Strength Pain Reliever [OTC]: Acetaminophen 194 mg, aspirin 227 mg, and caffeine 33 mg
Geltab: Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg Excedrin® Extra Strength [OTC], Excedrin® Migraine [OTC]: Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg
Powder: Acetaminophen 260 mg, aspirin 520 mg, and caffeine 32.5 mg Goody's® Extra Strength Headache Powder [OTC]: Acetaminophen 260 mg, aspirin 520 mg, and caffeine 32.5 mg
Tablet: Excedrin® Extra Strength [OTC], Excedrin® Migraine [OTC], Genaced™ [OTC], Pain-Off [OTC]: Acetaminophen 250 mg, aspirin 250 mg, and caffeine 65 mg Fem-Prin® [OTC]: Acetaminophen 194.4 mg, aspirin 226.8 mg, and caffeine 32.4 mg Goody's® Extra Strength Pain Relief [OTC]: Acetaminophen 130 mg, aspirin 260 mg, and caffeine 16.25 mg
GENERIC EQUIVALENT AVAILABLE — Yes
USE — Relief of mild-to-moderate pain; mild-to-moderate pain associated with migraine headache
ADVERSE REACTIONS SIGNIFICANT — See individual agents.
CONTRAINDICATIONS — Hypersensitivity to acetaminophen, aspirin, salicylates, caffeine, or any component of the formulation; pregnancy
DRUG INTERACTIONS Acetaminophen: Substrate (minor) of CYP1A2, 2A6, 2C9, 2D6, 2E1, 3A4; Inhibits CYP3A4 (weak)
Aspirin: Substrate (minor) of CYP2C9
Caffeine: Substrate of CYP1A2 (major), 2C9 (minor), 2D6 (minor), 2E1 (minor), 3A4 (minor); Inhibits CYP1A2 (weak), 3A4 (moderate)
Also see individual agents.
ETHANOL / NUTRITION / HERB INTERACTIONS — Ethanol: Excessive intake of ethanol may increase the risk of acetaminophen-induced hepatotoxicity. Avoid ethanol or limit to <3 drinks/day.
PREGNANCY RISK FACTOR — D (show table)
PHARMACODYNAMICS / KINETICS — See individual agents.

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Infomed Drug Guide

The information contained in the "Infomed Drug Guide" is aimed at medical professionals and students of medicine and pharmacology. All of the data has been carefully compiled and checked, however, errors may occur. These errors may also result due to changes that have taken place in the medical sciences since the publication of the Drug Guide in 1994/2008, and cannot be excluded. In case of doubt, readers are encouraged to confirm the information contained herein with other sources before a drug is prescribed. Non-professionals should be aware that the "Infomed Drug Guide" does not seek to replace professional medical advice and/or treatment. Neither Infomed, nor the authors, claim that the information is in every respect accurate or complete. As a result, neither can be held responsible for any errors or omissions, or for any consequences resulting from the use of such information.

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