Drug interactions
Chlorpheniramine + Methamphetamine
Severity: Minor
Chlorpheniramine and Methamphetamine: minor interaction.
Last updated
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.
Summary
Methamphetamine may mask the sedation caused by chlorpheniramine, and the antihistamine may partly blunt stimulant effects. The net result is unpredictable and usually of limited clinical importance.
What this interaction means in plain words
Chlorpheniramine and Methamphetamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Chlorpheniramine belongs to Respiratory; Methamphetamine belongs to Central Nervous System.
Why it happens
Opposing CNS effects of a stimulant and a sedating H1 antihistamine; no established pharmacokinetic interaction.
What to do
No routine change is needed; advise patients not to rely on perceived alertness when driving or operating machinery.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Methamphetamine
- Isocarboxazid + Methamphetamine Contraindicated
- Linezolid + Methamphetamine Contraindicated
- Methamphetamine + Phenelzine Contraindicated
- Methamphetamine + Procarbazine Contraindicated
- Methamphetamine + Rasagiline Contraindicated
- Methamphetamine + Safinamide Contraindicated
Other interactions of Chlorpheniramine
Frequently asked questions
Can I take Chlorpheniramine with Methamphetamine?
MediHelp rates the interaction as minor. Chlorpheniramine and Methamphetamine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Methamphetamine may mask the sedation caused by chlorpheniramine, and the antihistamine may partly blunt stimulant effects. The net result is unpredictable and usually of limited clinical importance.
How serious is the interaction between Chlorpheniramine and Methamphetamine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine change is needed; advise patients not to rely on perceived alertness when driving or operating machinery.
What other medicines interact with Methamphetamine?
MediHelp also lists interactions of Methamphetamine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Methamphetamine page.
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