Drug interactions
Lisdexamfetamine + Risperidone
Severity: Moderate
Lisdexamfetamine and Risperidone: 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
Risperidone blocks dopamine D2 receptors while lisdexamfetamine increases dopamine release, so each may reduce the other's effect. Stimulants can worsen psychosis, and the combination is sometimes used deliberately for ADHD with irritability. Extrapyramidal symptoms may occasionally be affected.
What this interaction means in plain words
Lisdexamfetamine and Risperidone 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.
Lisdexamfetamine belongs to Central Nervous System; Risperidone belongs to Central Nervous System.
Why it happens
Opposing pharmacodynamic actions at dopamine receptors.
What to do
Monitor for psychotic symptoms, extrapyramidal effects and reduced response to either drug. Adjust doses based on clinical response.
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 Lisdexamfetamine
- Isocarboxazid + Lisdexamfetamine Contraindicated
- Linezolid + Lisdexamfetamine Contraindicated
- Lisdexamfetamine + Phenelzine Contraindicated
- Lisdexamfetamine + Procarbazine Contraindicated
- Lisdexamfetamine + Rasagiline Contraindicated
- Lisdexamfetamine + Safinamide Contraindicated
Other interactions of Risperidone
- Ibutilide + Risperidone Contraindicated
- Risperidone + Vandetanib Contraindicated
- Adagrasib + Risperidone Major
- Amiodarone + Risperidone Major
- Amisulpride + Risperidone Major
- Amoxapine + Risperidone Major
Frequently asked questions
Can I take Lisdexamfetamine with Risperidone?
MediHelp rates the interaction as moderate. Lisdexamfetamine and Risperidone 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. Risperidone blocks dopamine D2 receptors while lisdexamfetamine increases dopamine release, so each may reduce the other's effect. Stimulants can worsen psychosis, and the combination is sometimes used deliberately for ADHD with irritability. Extrapyramidal symptoms may occasionally be affected.
How serious is the interaction between Lisdexamfetamine and Risperidone?
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 for psychotic symptoms, extrapyramidal effects and reduced response to either drug. Adjust doses based on clinical response.
What other medicines interact with Lisdexamfetamine?
MediHelp also lists interactions of Lisdexamfetamine with, for example, Isocarboxazid, Linezolid, Phenelzine. The full list is on the Lisdexamfetamine page.
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