Drug interactions
Caffeine + Diethylpropion
Severity: Moderate
Caffeine and Diethylpropion: moderate 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
Both agents stimulate the central nervous system, so combined use can increase nervousness, insomnia, tremor, palpitations and blood pressure. The effect is additive and is more noticeable with high caffeine intake.
What this interaction means in plain words
Caffeine and Diethylpropion can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive CNS and sympathomimetic stimulation (adenosine antagonism plus catecholamine release by diethylpropion).
What to do
Limit caffeine intake from beverages and supplements while on diethylpropion, and monitor heart rate and blood pressure.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Caffeine
- Caffeine + Ephedrine Major
- Caffeine + Fezolinetant Major
- Caffeine + Methylenedioxymethamphetamine Major
- Caffeine + Selegiline transdermal Major
- Adenosine + Caffeine Moderate
- Benzphetamine + Caffeine Moderate
Frequently asked questions
Can I take Caffeine with Diethylpropion?
MediHelp rates the interaction as moderate. Caffeine and Diethylpropion can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Both agents stimulate the central nervous system, so combined use can increase nervousness, insomnia, tremor, palpitations and blood pressure. The effect is additive and is more noticeable with high caffeine intake.
How serious is the interaction between Caffeine and Diethylpropion?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Limit caffeine intake from beverages and supplements while on diethylpropion, and monitor heart rate and blood pressure.
What other medicines interact with Caffeine?
MediHelp also lists interactions of Caffeine with, for example, Ephedrine, Fezolinetant, Methylenedioxymethamphetamine. The full list is on the Caffeine page.
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