Late August’s loss of exclusivity for Vyvanse (lisdexamfetamine) in the US represents one of the most significant off-patent opportunities of 2023, and at least two suppliers are already in the market with their versions of the blockbuster attention-deficit/hyperactivity disorder treatment, amid suggestions that demand will be particularly high given current shortages of ADHD drugs.
Coming immediately after the US Food and Drug Administration approved more than a dozen generic versions of lisdexamfetamine in 10mg, 20mg, 30mg 40mg, 50mg, 60mg and 70mg strengths – as well as a handful of generic lisdexamfetamine chewable tablets in 10mg, 20mg, 30mg 40mg, 50mg and 60mg strengths (see sidebar) –