There are two significant messages for companies developing and profiting from obesity drugs in a meta-analysis of clinical trials examining the extent of weight regain after treatment stops. First, people taking obesity medication regain weight four times faster on average than those who lose weight through behavioral diet and exercise programs; and second, poor tolerability leads to poor adherence.

The newly released 2026 edition of Clarivate’s Drugs to Watch report highlights 11 potential blockbusters that could change treatment paradigms for patients.

The U.S. FDA dashed hopes that Corcept Therapeutics Inc. might be able to launch its selective glucocorticoid receptor antagonist in two indications in 2026, issuing a complete response letter for relacorilant for use in patients with hypertension secondary to hypercortisolism, also known as Cushing syndrome. Focus is now on the July 2026 PDUFA date, as Corcept seeks approval for the same drug as a treatment for patients with platinum-resistant ovarian cancer.

When glucagon-like peptide-1 (GLP-1) receptor agonists entered the market for obesity and overweight indications in recent years, the uptake and enthusiasm drove investor excitement for companies advancing any of the new mechanisms in the space.

Gene editing technologies are moving forward in preclinical development with innovative strategies designed to treat diseases at their root and even reverse them. However, many approaches still struggle to reach target cells or tissues – either they fail to arrive, or their efficacy is low. In vivo therapies face numerous challenges, but despite these hurdles, 2025 has marked a year of remarkable progress.

The year 2025 proved especially active with regard to deals that centered on the indication previously known as nonalcoholic steatohepatitis (NASH).

In a threshold event in the U.S., Medicare is planning to break through its obesity coverage barrier with a voluntary test of a model designed to enable Medicare Part D plans and state Medicaid programs to cover GLP-1 drugs prescribed for weight management.

Needle-phobic obesity patients got their first workaround with the U.S. FDA clearance of Novo Nordisk A/S’ once-daily GLP-1 Wegovy (semaglutide) pill, the first of its kind.

Biomarin Pharmaceutical Inc. followed up its May takeover of Inozyme Pharma Inc. with a much larger agreement to acquire Amicus Therapeutics Inc. for $14.50 per share in an all-cash transaction, tipping the equity-value scale about $4.8 billion.