Caught between the rock and the hard place of most-favored nation (MFN) pricing and the threat of a hefty biopharma sector tariff, drug companies marketing in the U.S. are exploring their options. Several large firms already have committed millions and billions of dollars in investment in new or expanded U.S.-based manufacturing facilities to avoid tariffs on finished drugs.

Although U.S. President Donald Trump’s Oct. 1 start date for a hefty biopharma sector tariff has come and gone, the threat remains, serving as both a stick and a carrot to get drug companies to come to the table with their best deals.

Phase IIb data of Metsera Inc.’s lead GLP-1 receptor agonist, MET-097i, showed significant weight loss and good tolerability, supporting a phase III start later this year, and validating Pfizer Inc.’s decision a week ago to buy the obesity-focused company for $7.3 billion.

Eli Lilly and Co.’s oral selective estrogen receptor degrader (SERD) imlunestrant has been approved by the U.S. FDA for treating late-stage breast cancer patients. Branded Inluriyo, the second-line treatment is for treating adults with estrogen receptor-positive, human epidermal growth factor receptor-2-negative estrogen receptor 1-mutant advanced or metastatic breast cancer.

Pfizer Inc. bounced back in a big way from a GLP-1 trip-up this spring by making known its plan to take over what Metsera Inc. CEO Whit Bernard has called the “scale-obsessed” obesity player that he steers. Pfizer has agreed to pay $47.50 each for all of Metsera’s outstanding shares.

Following a May phase II readout and a recent presentation of Tourmaline Bio Inc.’s long-acting anti-IL-6 IgG2 monoclonal antibody, pacibekitug, for atherosclerotic cardiovascular disease (ASCVD), Novartis AG offered $1.4 billion, or $48 per share, to buy the barely 4-year-old company. Previously shelved by Pfizer Inc., which had been developing it for autoimmune disorders, pacibekitug fell into the hands of New York-based Tourmaline through a May 2022 license agreement. In addition to the Tranquility phase II trial in ASCVD, the company’s lead product is also in the phase IIb Spirited trial for thyroid eye disease, a readout for which is expected in early 2026.

Pfizer Inc. provided details on the discovery and in vitro/in vivo characteristics of SIK inhibitor PF-07899895 for the treatment of inflammatory bowel disease (IBD). Pfizer’s program focused on pan-SIK inhibition to regulate cytokine production in immune cells based on the hypothesis that this approach could suppress pro-inflammatory cytokines/chemokines and promote an anti-inflammatory phenotype.