Sepiapterin and Sulfasalazine interaction
Sepiapterin and Sulfasalazine: the Sepiapterin prescribing label flags this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Major
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Sepiapterin (Sephience) label · effective 2026-04-24
Major
Sepiapterin Reductase (SR) Inhibitors : Avoid concomitant use (e.g. sulfasalazine or sulfamethoxazole).
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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.