Answer
Sinepin (doxepin hydrochloride) capsules used with buprenorphine increase the risk of potentially life-threatening serotonin syndrome, so co-administration requires caution.
Sources for this answer
- Sinepin Capsules 50mg / Doxepin 50 mg CapsulesMarlborough Pharmaceuticals Ltd · emc · SmPC §4.5 Interaction with other medicinal products · Version 5Document updated
Sources checked