Drug interactions
Lorlatinib + Secobarbital
Severity: Contraindicated
Lorlatinib and Secobarbital: contraindicated 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, a barbiturate, induces CYP3A and may substantially lower lorlatinib exposure. Strong CYP3A inducers have caused hepatotoxicity with lorlatinib and may reduce its antitumor effect.
What this interaction means in plain words
Lorlatinib and Secobarbital are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Lorlatinib belongs to Oncology; Secobarbital belongs to Central Nervous System.
Why it happens
Barbiturate induction of CYP3A increases lorlatinib clearance and reduces plasma concentrations.
What to do
Do not co-administer; use a non-inducing sedative. If an inducer must be stopped, wait about three half-lives before starting lorlatinib.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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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 Lorlatinib
- Amobarbital + Lorlatinib Contraindicated
- Apalutamide + Lorlatinib Contraindicated
- Butabarbital + Lorlatinib Contraindicated
- Carbamazepine + Lorlatinib Contraindicated
- Enzalutamide + Lorlatinib Contraindicated
- Fosphenytoin + Lorlatinib Contraindicated
Frequently asked questions
Can I take Lorlatinib with Secobarbital?
MediHelp rates the interaction as contraindicated. Lorlatinib and Secobarbital are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Secobarbital, a barbiturate, induces CYP3A and may substantially lower lorlatinib exposure. Strong CYP3A inducers have caused hepatotoxicity with lorlatinib and may reduce its antitumor effect.
How serious is the interaction between Lorlatinib and Secobarbital?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Do not co-administer; use a non-inducing sedative. If an inducer must be stopped, wait about three half-lives before starting lorlatinib.
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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