Testosterone and Triptorelin interaction
Testosterone and Triptorelin: the Triptorelin prescribing label describes an interaction that usually calls for monitoring, a dose change, or spacing the doses.
Usually manageable with monitoring or a dose change. Tell your pharmacist you take both.
What the FDA labels say
From the Triptorelin (Trelstar) label · effective 2026-06-30
Tumor Flare: Transient increase in serum testosterone levels can occur within the first few weeks of treatment.
Tumor Flare Initially, triptorelin (TRELSTAR), like other GnRH agonists, causes a transient increase in serum testosterone levels [ see Clinical Pharmacology (12.2) ].
Laboratory Tests Monitor serum levels of testosterone following injection of TRELSTAR.
In the majority of patients, testosterone levels increased above baseline, and then declined thereafter to castrate levels (< 50 ng/dL) within four weeks [see Clinical Studies ( 14 ) and Adverse Reactions ( 6 )] .
Effect on QT/QTc Interval: Androgen deprivation therapy may prolong the QT interval.
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.