Drug interactions
Secobarbital + Siponimod
Severity: Major
Secobarbital and Siponimod: 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
Secobarbital may decrease siponimod exposure, possibly reducing control of multiple sclerosis activity.
What this interaction means in plain words
Secobarbital and Siponimod 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.
Secobarbital belongs to Central Nervous System; Siponimod belongs to Central Nervous System.
Why it happens
Barbiturate induction of CYP3A4 (with CYP2C9 contribution) increases siponimod clearance.
What to do
Avoid use with moderate or strong CYP3A4 inducers in CYP2C9*1/*3 or *2/*3 patients; otherwise monitor disease activity.
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 Secobarbital
- Calcium / magnesium / potassium / sodium oxybates + Secobarbital Contraindicated
- Doravirine + Secobarbital Contraindicated
- Elbasvir / grazoprevir + Secobarbital Contraindicated
- Elvitegravir / cobicistat / emtricitabine / tenofovir df + Secobarbital Contraindicated
- Isavuconazonium + Secobarbital Contraindicated
- Lonafarnib + Secobarbital Contraindicated
Other interactions of Siponimod
- Cladribine + Siponimod Contraindicated
- Fingolimod + Siponimod Contraindicated
- Fluconazole + Siponimod Contraindicated
- Influenza virus vaccine quadrivalent intranasal + Siponimod Contraindicated
- Ponesimod + Siponimod Contraindicated
- Siponimod + Thioridazine Contraindicated
Frequently asked questions
Can I take Secobarbital with Siponimod?
MediHelp rates the interaction as major. Secobarbital and Siponimod 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. Secobarbital may decrease siponimod exposure, possibly reducing control of multiple sclerosis activity.
How serious is the interaction between Secobarbital and Siponimod?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid use with moderate or strong CYP3A4 inducers in CYP2C9*1/*3 or *2/*3 patients; otherwise monitor disease activity.
What other medicines interact with Secobarbital?
MediHelp also lists interactions of Secobarbital with, for example, Calcium / magnesium / potassium / sodium oxybates, Doravirine, Elbasvir / grazoprevir. The full list is on the Secobarbital page.
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