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Altimmune drug cuts heavy drinking in mid-stage trial for alcohol use disorder

By Thomson Reuters Jul 28, 2026 | 6:08 AM

July 28 (Reuters) – Altimmune said on Tuesday its experimental drug helped patients with alcohol use disorder cut back on heavy drinking in a mid-stage trial, sending ​the company’s shares 10% higher in premarket trading.

The ‌drug, pemvidutide, showed a placebo-adjusted reduction of 1.45 heavy drinking days per week in the trial, which tested a 2.4 mg dose in about 100 patients with moderate to severe alcohol use disorder over ‌24 ​weeks.

Ahead of the trial results, Jefferies analysts ⁠had forecast a placebo-adjusted ⁠reduction of about 0.9 to 1.1 heavy drinking days per week.

The drug, which is also being tested for weight loss, activates both glucagon and GLP-1 receptors. Its effect ​on GLP-1 receptors suppresses appetite and regulates cravings, and the results could potentially expand pemvidutide’s market, if it ⁠secures approval for alcohol use disorder.

“While ⁠cross-trial comparisons to (Novo Nordisk’s) semaglutide are challenging, we ​think pemvi’s initial efficacy results look encouraging,” Leerink Partners analyst ​Thomas Smith said.

The drug also met key secondary goals ‌of the study, including increasing the proportion of patients who achieved a two-level reduction in World Health Organization risk drinking levels and those reporting no heavy drinking days during the ⁠final four weeks of treatment.

Pemvidutide was generally well tolerated, Altimmune said. Gastrointestinal side effects, including nausea, vomiting and constipation, were more common ⁠in the treatment ‌group.

Five patients discontinued treatment because of drug-related ⁠side effects, while one serious adverse event, ​low ‌sodium levels in the blood, was considered ​possibly related to ⁠the drug.

Altimmune said it plans to seek a meeting with the U.S. Food and Drug Administration to discuss next steps.

The drug is also being tested for liver diseases including MASH and alcohol-related liver damage.

(Reporting by Kamal Choudhury in Bengaluru; Editing ​by Harikrishnan Nair)