Mounjaro vs Foundayo
Both from Eli Lilly, but one is a weekly diabetes injection and the other is a daily oral pill for weight loss. Very different approaches.
20%
Avg weight loss Mounjaro
11.1%
Avg weight loss Foundayo
$1,112/mo
Mounjaro retail (no insurance)
$779/mo
Foundayo retail (no insurance)
What are they?
Mounjaro uses injectable tirzepatide approved for type 2 diabetes, with off-label weight loss use. Foundayo is a daily oral orforglipron pill approved specifically for obesity.
Mounjaro
Type 2 DiabetesFDA-approved to improve blood sugar control in adults with type 2 diabetes. Uses a dual GIP/GLP-1 receptor mechanism, activating both simultaneously. It’s not a weight loss drug but does regulate blood sugar and decrease how much food you consume.
Maker
Eli Lilly
Approved
2022
Format
Weekly injection
Max dose
15 mg
Foundayo
Weight ManagementFDA-approved oral GLP-1 receptor agonist for chronic weight management — the first weight-loss pill that can be taken at any time of day with no food or water restrictions. Made by Eli Lilly, approved April 2026.
Maker
Eli Lilly
Approved
2026
Format
Daily oral pill
Max dose
17.2 mg
Quick comparison
How they stack up on the metrics that matter most.
| Feature | Mounjaro | Foundayo |
|---|---|---|
| Active ingredient | Tirzepatide | Orforglipron |
| FDA approved for | Type 2 Diabetes | Weight Management |
| Max dose | 15 mg | 17.2 mg |
| Avg weight loss | ~20% | ~11.1% |
| Administration | Weekly injection | Daily oral pill |
| Insurance | Moderate | Limited |
| Retail price/mo | $1,112/mo | $779/mo |
| Telehealth price | From $149/mo | From $149/mo |
Mounjaro
Tirzepatide
Foundayo
Orforglipron
Mounjaro
Type 2 Diabetes
Foundayo
Weight Management
Mounjaro
15 mg
Foundayo
17.2 mg
Mounjaro
~20%
Foundayo
~11.1%
Mounjaro
Weekly injection
Foundayo
Daily oral pill
Mounjaro
Moderate
Foundayo
Limited
Mounjaro
$1,112/mo
Foundayo
$779/mo
Mounjaro
From $149/mo
Foundayo
From $149/mo
More energy,
less weight
How you ramp up
Both medications use a gradual dose escalation to minimize side effects.
Mounjaro
- 1
2.5 mg
Weeks 1–4
- 2
5 mg
Weeks 5–8
- 3
7.5 mg
Weeks 9–12
- 4
10 mg
Weeks 13–16
- 5
12.5 mg
Weeks 17–20
- 6
15 mg
Weeks 21+
(Maintenance)
Foundayo
- 1
0.8 mg
Month 1
(Daily)
- 2
2.5 mg
Month 2
(Daily)
- 3
5.5 mg
Month 3
(Daily)
- 4
9 mg
Month 4
(Daily)
- 5
14.5 mg
Month 5
(Daily)
- 6
17.2 mg
Month 6+
(Maintenance)
What you’ll pay
Real pricing — no misleading teaser rates or hidden fees.
Mounjaro
- Retail (no insurance)
- $1,112/mo
- With insurance
- $25–$200/mo
- Telehealth (compounded)
- From $149/mo
- Manufacturer savings
- Available
Special offer
Save up to 30% EVERY month!
Foundayo
- Retail (no insurance)
- $779/mo
- With insurance
- $25–$200/mo
- Telehealth (compounded)
- From $149/mo
- Manufacturer savings
- Available
Special offer
Save up to 30% EVERY month!
Some providers pay BestGLP1 a referral fee when you sign up. We disclose this because the FTC requires it. Our rankings are editorial.
Start your weight‑loss
journey today
Weight loss compared
Clinical trial data showing average body weight reduction over 68 weeks.
Mounjaro (15 mg)
Foundayo (17.2 mg)
Placebo
What to expect
How they stack up on the metrics that matter most.
| Side Effect | Mounjaro | Foundayo |
|---|---|---|
| Nausea | 18% | 35% |
| Diarrhea | 17% | 25% |
| Vomiting | 9% | 22% |
| Constipation | 7% | 24% |
| Headache | 4% | 9% |
| Fatigue | 4% | 9% |
Mounjaro
18%
Foundayo
35%
Mounjaro
17%
Foundayo
25%
Mounjaro
9%
Foundayo
22%
Mounjaro
7%
Foundayo
24%
Mounjaro
4%
Foundayo
9%
Mounjaro
4%
Foundayo
9%
* Foundayo rates at 17.2 mg max dose
Side effects are generally most pronounced during the first 4–8 weeks and tend to subside. Always consult your healthcare provider.
The bottom line
Different molecules, different mechanisms. Here’s how to think about it.
Choose based on your goal
- Choose Mounjaro if you have type 2 diabetes and want the dual GIP/GLP-1 mechanism with strong insurance eligibility and measurable A1C improvements alongside weight loss.
- Choose Foundayo if you’re managing weight without a diabetes diagnosis and prefer a daily oral pill — FDA-approved for obesity with no injection required.
Some providers pay BestGLP1 a referral fee when you sign up. We disclose this because the FTC requires it. Our rankings are editorial.
What you
need to know
Foundayo is only FDA-approved for chronic weight management, not type 2 diabetes. If you have a diabetes diagnosis, Mounjaro (or another GLP-1 with a diabetes indication) is the appropriate choice — your provider can confirm which fits your case.
Not currently. Foundayo’s FDA approval is for obesity and overweight with weight-related comorbidities, not diabetes. Eli Lilly has run separate diabetes trials for orforglipron, but as of April 2026 it does not carry a type 2 diabetes indication.
Tirzepatide’s dual GIP/GLP-1 mechanism produces nearly double the average weight loss of orforglipron in trials (about 20% vs 11.1%). The trade-off is a weekly injection versus a once-daily pill with no food or water restrictions.
Mounjaro typically has broader coverage when prescribed for type 2 diabetes, since most plans cover diabetes drugs more readily than weight-loss drugs. Foundayo coverage varies and depends on whether your plan includes obesity medications.
Yes. Both Mounjaro and Foundayo require a prescription from a licensed healthcare provider. A consultation is required to assess whether treatment is appropriate for you.
BestGLP1 publishes these guides for informational and comparison purposes only. The information on this site is not medical advice, diagnosis, or treatment, and is not a substitute for guidance from a licensed healthcare professional. GLP-1 medications must be prescribed and monitored by a qualified provider; consult your provider to determine whether treatment is appropriate for your individual circumstances. Prices, side-effect rates, and clinical figures shown here are general references drawn from manufacturer labelling and published trials, and may not reflect your specific situation.
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Some providers pay BestGLP1 a referral fee when you sign up. We disclose this because the FTC requires it. Our rankings are editorial.