News|Articles|April 17, 2026

Eli Lilly’s Oral Weight Loss Pill Prescribed Over 1,000 Times in First Days on Market

Author(s)Mike Hollan
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Key Takeaways

  • Early prescription volume signals uptake for an oral anti-obesity entrant, but competitive positioning versus oral semaglutide is better assessed after several weeks of normalized channel capture.
  • Market attention is shifting toward orals competing with established injectable GLP-1/GIP therapies, which currently dominate sales despite convenience advantages of once-daily tablets.
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Market analysts are comparing Foundayo’s sales with other GLP-1 medications, such as the oral version of Wegovy.

Lilly’s Foundayo is reportedly off to a strong start.

The company’s obesity only recently hit the market, and a report from Reuters says that the pill saw 1,390 prescriptions in its first week.1 The data, collected and analyzed by IQVIA, is reportedly based on two days of capture, ending on April 10.

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However, rival weight-loss drug provider Novo Nordisk’s Wegovy launched in January of this year and reportedly saw 3,071 prescriptions during its first four days. Both companies are fighting for control of the obesity medication market space.

How are analysts reacting to Foundayo’s launch?

RBC Capital Markets analyst Trung Huynh spoke with Reuters on the two launches and explained that comparing early launch data won’t provide the full picture of which drug is more popular. Instead, he says its important to see how Foundayo compares to the Wegovy pill at about eight-to-ten weeks.

Reuters also reports that shares for Eli Lilly rose 1.6% before the markets opened on Friday, April 17th (the same day this news broke).

Analysts are closely watching the market, as oral versions of the medications are entering alongside the traditional injectables. So far, injectable versions of weight loss medications still lead sales.

Earlier this week, FDA announced that despite Foundayo’s approval, the agency still required post-approval safety studies for the medication. The agency’s approval letter detailed a series of risks that it believed it could not fully characterize based on existing data. These risks include:

  • Heart attack
  • Strong
  • Drug-induced liver injury
  • Delayed stomach emptying

FDA also requested 15 years of thyroid cancer risk data, which is consistent with the existing warnings on previous iterations of Wegovy and Zepbound. However, the agency also requires Lilly to establish a registry of children and pregnant women taking the medication to treat obesity to monitor outcomes.

In response to FDA’s requirements,2 Lilly issued a statement on the safety profile for Foundayo. In the statement, senior vice president of product development at Lilly Cardiometabolic Health Thomas Seck, MD, said, “Across seven Phase 3 studies enrolling more than 11,000 patients, Foundayo has demonstrated a consistent safety and efficacy profile. ACHIEVE-4 adds a new dimension to that evidence—cardiovascular safety and a lower observed risk of all-cause death in patients who carry elevated cardiovascular risk. Together with the simplicity of a once-daily pill that requires no food or water restrictions, we believe Foundayo could be an important new treatment option for people with type 2 diabetes."

Lilly also plans to submit Foundayo for approval to treat Type 2 diabetes by the end of the second quarter 2026 using a Commissioner’s National Priority Review Voucher. Foundayo was approved for obesity under the same priority program.

At the time of the drug’s approval, Lilly’s chair and CEO David Ricks said, “We believe Foundayo can help level the playing field for those living with obesity or who are overweight and living with weight-related complications. As a convenient, once-daily oral pill that delivers meaningful weight loss, this is obesity care designed for the real world."

Sources

  1. Lilly's obesity pill draws 1,390 US prescriptions in launch week. Reuters. April 17, 2026. https://www.reuters.com/legal/litigation/lillys-foundayo-hits-1390-prescriptions-debut-week-2026-04-17/
  2. ACHIEVE-4, the longest Phase 3 study of Lilly's Foundayo (orforglipron) to date, reaffirmed its cardiovascular and overall safety profile as well as consistent improvements across key measures of cardiometabolic health.Eli Lilly. April 16, 2026. https://investor.lilly.com/news-releases/news-release-details/achieve-4-longest-phase-3-study-lillys-foundayo-orforglipron

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