What Is Foundayo? Lilly's Orforglipron Pill, Explained

Foundayo is the brand name for orforglipron, a GLP-1 receptor agonist taken by mouth once a day.1 Lilly describes it as a small-molecule, non-peptide drug.3 That sets it apart from semaglutide and tirzepatide, which are peptides. It is approved alongside a reduced-calorie diet and more physical activity to reduce excess body weight and keep it off long term.1

The approved users are adults with obesity, or adults with overweight and at least one weight-related condition.1 Foundayo is not approved for children, and the label says it should not be combined with another GLP-1 drug.1 Lilly made it available from April 9, 2026, through LillyDirect, telehealth providers and retail pharmacies.3

Yes. The FDA label classifies Foundayo as a GLP-1 receptor agonist.1 It acts on the same receptor as semaglutide but is a different kind of molecule.3

No. Foundayo contains orforglipron, not tirzepatide.1 Tirzepatide is the active ingredient in Zepbound and Mounjaro, which are weekly injections that act on both GIP and GLP-1 receptors.5 Both drugs are made by Lilly, which is a common source of the confusion.

Take one Foundayo tablet by mouth once a day, with or without food.1 Swallow it whole; do not break, crush or chew it.1 There is no fasting window and no water limit, which is the main practical difference from the Wegovy pill.3,6

If you miss a dose, take it as soon as possible, and do not double the next one.1 If you miss 7 or more doses in a row, the label says to restart the dose escalation at a lower dose.1

Two label details matter in daily life. Foundayo can reduce how well oral birth control works, so women using it should switch to a non-oral method or add a barrier method for 30 days after starting and after each dose increase.1 Some drugs that block the liver enzyme CYP3A4 raise orforglipron levels, and with a strong CYP3A4 inhibitor the maximum Foundayo dose is 9 mg.1

Foundayo comes in six strengths: 0.8 mg, 2.5 mg, 5.5 mg, 9 mg, 14.5 mg and 17.2 mg.1

Every patient goes from 0.8 mg to 2.5 mg to 5.5 mg, each after at least 30 days.1 Moving to 9 mg, 14.5 mg or 17.2 mg depends on response and tolerability.1 Unlike the Wegovy pill, Foundayo's label lets a person stay at 5.5 mg or another step.1,6

In the ATTAIN-1 trial, adults without diabetes on Foundayo 17.2 mg lost an average of 11.1% of body weight at 72 weeks, against 2.1% on placebo.1 On 5.5 mg and 9 mg, average losses were 7.4% and 8.3%.1 The trial enrolled 3,127 adults with obesity, or overweight and a weight-related condition.1

Lilly's own headline is higher: 12.4%, or 27.3 pounds, on the top dose.3 That figure assumes people stayed on treatment for all 72 weeks, while the label's 11.1% counts everyone randomized.1,3 On the top dose, 54.5% lost at least 10% of their weight and 18.4% lost at least 20%.1

In a second trial in adults with type 2 diabetes, the top dose produced an average loss of 9.6% against 2.5% on placebo.1

The most common side effects are stomach-related. On the 17.2 mg dose, nausea affected 35%, diarrhea 25%, constipation 24% and vomiting 24%, against 10%, 11%, 9% and 4% on placebo.1 Across both trials, 8% of people on Foundayo stopped because of side effects, compared with 3% on placebo.1 Foundayo carries the same boxed warning about thyroid C-cell tumors as other GLP-1 drugs.1

Foundayo costs $149 a month at 0.8 mg and 2.5 mg, $199 at 5.5 mg and $299 at 9 mg, 14.5 mg and 17.2 mg at Lilly's self-pay prices, checked October 7, 2026.4 Two of those are temporary: Lilly has cut 2.5 mg to $149 and 5.5 mg to $199 through December 31, 2026, from regular prices of $199 and $299.4 The $299 price on 14.5 mg and 17.2 mg depends on refilling on time; the regular price for those doses is $349.4

With commercial insurance that covers Foundayo, the savings card can bring a 1-, 2- or 3-month fill to as little as $25, with savings capped at $100 a month and $1,000 a year.4 Programs that prescribe it are in our GLP-1 pill ranking, and the GLP-1 cost without insurance guide puts every brand side by side.

Zepbound produced larger average weight loss than Foundayo, but the two have not been compared in a head-to-head trial. In separate 72-week trials, Zepbound 15 mg led to an average loss of 20.9% against 3.1% on placebo, and Foundayo 17.2 mg led to 11.1% against 2.1%.1,5 The trials enrolled different people, so the gap is a guide, not a precise measure.

The choice usually comes down to needles, cost and how much weight loss is needed. The full side-by-side is on Foundayo vs Zepbound.

Orforglipron is a small-molecule tablet that acts on the GLP-1 receptor alone.1,3 Tirzepatide is a peptide injection that acts on both GIP and GLP-1 receptors.5 In their pivotal 72-week trials, tirzepatide's top dose produced roughly twice the average weight loss.1,5 For tirzepatide in more depth, see what is Zepbound.

Foundayo and the Wegovy pill are both daily GLP-1 tablets, but the Wegovy pill produced slightly more weight loss on its label while Foundayo is easier to take. The Wegovy 25 mg tablet led to an average loss of 13.6% at 64 weeks, against Foundayo's 11.1% at 72 weeks on the top dose.1,6 The Wegovy pill must be taken in the morning on an empty stomach with a 30-minute wait; Foundayo has no food or water rules.1,6

Prices are close: both start at $149 a month and reach $299 at maintenance doses.4,8 The weekly Wegovy injection, at 14.9% average loss with 2.4 mg, is a third option.6 See Foundayo vs Wegovy and the Wegovy pill guide.

Who makes Foundayo? Eli Lilly and Company, which also makes Zepbound and Mounjaro.1

Is Foundayo as effective as Zepbound? Not on average. In separate trials, Zepbound's top dose produced 20.9% average weight loss and Foundayo's 11.1%.1,5

Is Foundayo safe? The FDA approved it after trials in more than 3,000 adults, but it has real risks, including pancreatitis, gallbladder disease and severe stomach reactions, and a boxed warning on thyroid tumors.1

Is Foundayo covered by insurance? It depends on the plan. With coverage, the savings card can cut the cost to as little as $25.4

How do I get Foundayo? You need a prescription. Lilly says Foundayo is available through LillyDirect, telehealth providers and US retail pharmacies.2

To compare programs that prescribe Foundayo and other GLP-1 tablets, see our best oral GLP-1 programs.

This article is for information only and is not medical advice. Foundayo is a prescription drug with real risks and side effects. Talk to a licensed clinician before starting, stopping or changing any treatment, and confirm prices with the pharmacy before you pay.