sertraline and tramadol

Pharmacodynamic interaction: both drugs enhance serotonergic transmission. Sertraline inhibits serotonin reuptake; tramadol inhibits serotonin reuptake and increases serotonin release. Additive effects can lead to excessive serotonergic activity. Additionally, sertraline inhibits CYP2D6, which may increase tramadol concentration, but the primary risk is serotonin syndrome.

Co-administration can precipitate serotonin syndrome, a potentially life-threatening condition characterised by agitation, confusion, muscle rigidity, hyperthermia, autonomic instability, and seizures. Tramadol also lowers the seizure threshold, and sertraline can too, so seizure risk is increased. Symptoms usually appear within hours to days.

Avoid combination where possible. If necessary, use the lowest effective doses, prescribe with extreme caution, and monitor the patient closely for signs of serotonin syndrome (e.g., mental status changes, fever, sweating, tremor, hyperreflexia, clonus). Consider a non-serotonergic analgesic such as an NSAID or a pure opioid (e.g., morphine) as an alternative. Advise the patient to seek urgent medical attention if symptoms occur.

Well-established interaction. Numerous case reports and clinical guidelines warn against or advise caution with the combined use of SSRIs and tramadol due to serotonin syndrome risk. Included in major interaction checkers.