Drug interactions
Lisdexamfetamine + Thiothixene
Severity: Moderate
Lisdexamfetamine and Thiothixene: 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
Thiothixene is a sedating antipsychotic with dopamine-blocking action, which opposes the dopaminergic stimulation of lisdexamfetamine. This may reduce the effectiveness of both drugs, and stimulants can worsen psychosis in susceptible patients.
What this interaction means in plain words
Lisdexamfetamine and Thiothixene 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
Pharmacodynamic antagonism between dopamine receptor blockade and amphetamine-induced dopamine release.
What to do
Monitor psychotic symptoms and efficacy of both agents. Avoid stimulants in patients with active psychosis.
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
Frequently asked questions
Can I take Lisdexamfetamine with Thiothixene?
MediHelp rates the interaction as moderate. Lisdexamfetamine and Thiothixene 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. Thiothixene is a sedating antipsychotic with dopamine-blocking action, which opposes the dopaminergic stimulation of lisdexamfetamine. This may reduce the effectiveness of both drugs, and stimulants can worsen psychosis in susceptible patients.
How serious is the interaction between Lisdexamfetamine and Thiothixene?
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 psychotic symptoms and efficacy of both agents. Avoid stimulants in patients with active psychosis.
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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