Drug interactions
Methamphetamine + Ziprasidone
Severity: Major
Methamphetamine and Ziprasidone: major 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
Ziprasidone blocks dopamine receptors and prolongs the QT interval, while methamphetamine stimulates dopaminergic and sympathetic activity. The effects oppose each other therapeutically, and cardiac risk may increase because of tachycardia and QT prolongation.
What this interaction means in plain words
Methamphetamine and Ziprasidone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Methamphetamine belongs to Central Nervous System; Ziprasidone belongs to Central Nervous System.
Why it happens
Opposing dopaminergic pharmacodynamics plus additive cardiac effects including QT prolongation.
What to do
Obtain a baseline ECG and monitor QTc and electrolytes if both are used. Consider alternatives to ziprasidone in patients with cardiac risk factors.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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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 Ziprasidone
- Amiodarone + Ziprasidone Contraindicated
- Amitriptyline + Ziprasidone Contraindicated
- Arsenic trioxide + Ziprasidone Contraindicated
- Bedaquiline + Ziprasidone Contraindicated
- Chloroquine + Ziprasidone Contraindicated
- Citalopram + Ziprasidone Contraindicated
Frequently asked questions
Can I take Methamphetamine with Ziprasidone?
MediHelp rates the interaction as major. Methamphetamine and Ziprasidone can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Ziprasidone blocks dopamine receptors and prolongs the QT interval, while methamphetamine stimulates dopaminergic and sympathetic activity. The effects oppose each other therapeutically, and cardiac risk may increase because of tachycardia and QT prolongation.
How serious is the interaction between Methamphetamine and Ziprasidone?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Obtain a baseline ECG and monitor QTc and electrolytes if both are used. Consider alternatives to ziprasidone in patients with cardiac risk factors.
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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