Drug reference
caffeine
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Drug class
Miscellaneous (Miscellaneous)
Mechanism of action
Methylxanthine; promotes cAMP accumulation by inhibiting phosphodiesterase; increases medullary respiratory center sensitivity to carbon dioxide; may prevent apnea by acting as an adenosine receptor antagonist
Common side effects
- Insomnia
- Tremors
- Nervousness
- Palpitations
- Tachycardia
- Irritability
Related conditions
Frequently asked questions
What drug class is caffeine?
caffeine belongs to: Miscellaneous.
How does caffeine work?
Methylxanthine; promotes cAMP accumulation by inhibiting phosphodiesterase; increases medullary respiratory center sensitivity to carbon dioxide; may prevent apnea by acting as an adenosine receptor antagonist
What are the common side effects of caffeine?
Insomnia, Tremors, Nervousness, Palpitations, Tachycardia, Irritability
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