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Do caffeine-containing analgesics promote dependence? A review and evaluation
A R Feinstein1, L A Heinemann, D Dalessio
1Department of Medicine and Epidemiology, Yale University School of Medicine, New Haven, CT, USA.
Clinical Pharmacology and Therapeutics
|December 5, 2000
Summary
Caffeine enhances analgesic effectiveness but has a low dependence potential. Evidence does not support claims that caffeine in phenacetin-free analgesics stimulates overuse, with strong dependence linked to phenacetin-containing products.
Area of Science:
- Pharmacology
- Clinical Practice
Background:
- Concerns exist regarding kidney disease and analgesic use, particularly the role of caffeine in combined analgesics.
- Phenacetin-containing analgesics have been associated with dependence, raising questions about caffeine's influence on overuse.
Purpose of the Study:
- To critically review literature on caffeine's role in analgesic use and overuse.
- To provide guidance for clinical practice and international regulatory authorities.
Main Methods:
- A committee of international scientists reviewed pertinent literature and expert reports.
- Experts evaluated relevant data, including experimental studies and clinical observations.
Main Results:
- Caffeine demonstrates synergistic effectiveness with analgesics and has a low dependence potential.
- No consistent evidence identifies specific analgesics (with or without caffeine) as causative for drug-induced headaches.
- Strong dependence behavior was primarily observed with phenacetin-containing analgesics.
Conclusions:
- Available evidence does not support the claim that caffeine in phenacetin-free analgesics stimulates or sustains overuse.
- While more data is desirable, current findings suggest caffeine's safety in this context.