Drug interactions
Fenfluramine + Insulin glargine
Severity: Moderate
Fenfluramine and Insulin glargine: 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
Fenfluramine can increase peripheral glucose uptake and reduce appetite, which may increase the risk of hypoglycemia in patients on insulin. Insulin requirements may fall during treatment.
What this interaction means in plain words
Fenfluramine and Insulin glargine 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.
Fenfluramine belongs to Central Nervous System; Insulin glargine belongs to Endocrine.
Why it happens
Enhanced peripheral glucose uptake and reduced food intake adds to the glucose-lowering effect of insulin.
What to do
Monitor blood glucose closely when fenfluramine is started and reduce the insulin dose if hypoglycemia occurs.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Fenfluramine and Insulin glargine, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 14 days on the web. No card needed.
Other interactions of Insulin glargine
Other interactions of Fenfluramine
- Fenfluramine + Isocarboxazid Contraindicated
- Fenfluramine + Linezolid Contraindicated
- Fenfluramine + Phenelzine Contraindicated
- Fenfluramine + Selegiline Contraindicated
- Fenfluramine + Tranylcypromine Contraindicated
- Almotriptan + Fenfluramine Major
Frequently asked questions
Can I take Fenfluramine with Insulin glargine?
MediHelp rates the interaction as moderate. Fenfluramine and Insulin glargine 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. Fenfluramine can increase peripheral glucose uptake and reduce appetite, which may increase the risk of hypoglycemia in patients on insulin. Insulin requirements may fall during treatment.
How serious is the interaction between Fenfluramine and Insulin glargine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood glucose closely when fenfluramine is started and reduce the insulin dose if hypoglycemia occurs.
What other medicines interact with Insulin glargine?
MediHelp also lists interactions of Insulin glargine with, for example, Alogliptin-pioglitazone, Ethanol, Glimepiride-pioglitazone. The full list is on the Insulin glargine page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
