Katridol 100 contains Tapentadol 100 mg, which is a controlled prescription medicine. Under Indian health and government regulations, Tapentadol is not permitted for online or over‑the‑counter sale because of the risks of misuse, dependence, and serious side effects. It is only available through offline hospital pharmacies or medical counters, and strictly with a valid physical prescription from a doctor. This ensures that it is used safely and only when medically necessary.