⚠️ Mechanism
Milk Thistle is a weak inhibitor of CYP3A4, which decreases metabolism of CYP3A4 substrates, potentially increasing their plasma concentrations and risk of adverse effects.
📋 Effect
Increased plasma levels of amitriptyline (tricyclic-antidepressants), potentially leading to toxicity or enhanced adverse effects.
💊 Management
Monitor for increased adverse effects of amitriptyline. Dose reduction may be necessary. Consider alternative supplement or consult healthcare provider.
Plain Language Summary
This combination may be moderately risky because milk thistle can slow down how your body breaks down tricyclic antidepressants. This can lead to higher levels of the medication building up in your system, which may increase your risk of side effects.
Source
Flockhart CYP450 Table (drug-interactions.medicine.iu.edu)