A generic version usually costs a fraction of the branded medicine. Lupin has US FDA approval for Modafinil tablets in 100 mg and 200 mg, matched to Provigil, which doctors prescribe for excessive sleepiness caused by narcolepsy, obstructive sleep apnoea or shift work disorder. The branded drug sold about $70.7 million in the US in the year to July 2026, so there is a real market to compete on price in.