Thai Badminton Star Pink Tests Positive for Banned Substance

Thai badminton has been rocked by news that player Pink Pichacha Opasnipat tested positive for a banned substance and will be suspended from the 2026 Asian Games in Japan. The substance detected was furosemide, a diuretic that blocks the reabsorption of sodium and chloride in the kidneys, causing the body to rapidly expel large amounts of fluid through urine. Doctors normally prescribe it to treat patients with water retention from heart disease, liver disease, kidney disease, or high blood pressure.

Furosemide is banned by the World Anti-Doping Agency under category S5 (Diuretics and Masking Agents) for three main reasons: it can mask other banned substances by diluting urine to undetectable levels; it enables rapid weight cutting to meet competition weight limits; and athletes may ingest it unintentionally through contaminated supplements or medications without consulting their team doctor.

Pink faces a stepped disciplinary process. She is currently suspended from competing, training, or participating in any Asian Games activities, and any competition results from after the test date will be voided. She has the right to request testing of the B-sample and appeal to the Court of Arbitration for Sport (CAS). If the B-sample confirms the positive result or she cannot prove her innocence, she could face a ban of 2 to 4 years under WADA rules. However, if she can prove the substance was ingested unintentionally without significant fault, the ban could be reduced to a warning or shorter suspension of 6 months to 2 years. The case will continue with further investigation by the Badminton Association and the International Testing Agency.