Drug interactions
Ketotifen + Ziconotide
Severity: Moderate
Ketotifen and Ziconotide: 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
Intrathecal ziconotide commonly causes dizziness, confusion and sedation, and ketotifen is a sedating antihistamine. Combined use may add to central nervous system effects, which matters because ziconotide can cause serious cognitive and psychiatric adverse effects.
What this interaction means in plain words
Ketotifen and Ziconotide 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.
Ketotifen belongs to Respiratory; Ziconotide belongs to Central Nervous System.
Why it happens
Additive central nervous system depression from N-type calcium channel blockade and H1-antihistamine activity.
What to do
Monitor for worsening sedation or cognitive impairment, and consider a non-sedating antihistamine. Reduce or stop ziconotide if serious central nervous system effects develop.
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 Ketotifen
- Ketotifen + Phenobarbital Moderate
- Ketotifen + Pholcodine Moderate
- Ketotifen + Primidone Moderate
- Ketotifen + Protriptyline Moderate
- Ketotifen + Quazepam Moderate
- Ketotifen + Rotigotine Moderate
Other interactions of Ziconotide
- Clozapine + Ziconotide Major
- Alprazolam + Ziconotide Moderate
- Amitriptyline + Ziconotide Moderate
- Amobarbital + Ziconotide Moderate
- Aripiprazole + Ziconotide Moderate
- Armodafinil + Ziconotide Moderate
Frequently asked questions
Can I take Ketotifen with Ziconotide?
MediHelp rates the interaction as moderate. Ketotifen and Ziconotide 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. Intrathecal ziconotide commonly causes dizziness, confusion and sedation, and ketotifen is a sedating antihistamine. Combined use may add to central nervous system effects, which matters because ziconotide can cause serious cognitive and psychiatric adverse effects.
How serious is the interaction between Ketotifen and Ziconotide?
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 worsening sedation or cognitive impairment, and consider a non-sedating antihistamine. Reduce or stop ziconotide if serious central nervous system effects develop.
What other medicines interact with Ketotifen?
MediHelp also lists interactions of Ketotifen with, for example, Phenobarbital, Pholcodine, Primidone. The full list is on the Ketotifen page.
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