Medications Explainedby a Pharmacist

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GLP-1s, Diabetes & Weight Management

Foundayo vs. Wegovy: what the thyroid data shows

Apr 24, 2026 · Short · Orforglipron

  • FOUNDAYO Black Box Warning – The Key Difference Most People Miss

Both FOUNDAYO and Wegovy carry the same black box warning for thyroid C-cell tumors.

But here’s what your pharmacist wants you to know:

  • Wegovy (semaglutide) did cause thyroid tumors in rodent studies.
  • FOUNDAYO (orforglipron) did NOT — it was not active in those studies.

The warning is applied class-wide to all GLP-1 drugs, but the underlying data is different.

Full pharmacist comparison in the video

Does Foundayo carry the same semaglutide thyroid risk as Wegovy?

We examine why rodent studies showed different results for these two medications. You will learn why the FDA applies a GLP-1 agonist black box warning to both drugs regardless of specific test data.

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