Key facts
At a glance
The numbers you need before deciding.
Weight loss
12.4%
Monthly cost
$149–$349/mo
How you take it
Daily pill
Main side effect
Nausea
Fat vs lean
Limited data
If you stop
Weight regain expected
Before you start
Learn about this treatment
Everything you'd want to know before deciding.
On treatment
Already taking this?
Practical guides for people currently on this medication.
Compare
Side-by-side comparisons
See how this drug compares with another, side by side.
Clinical evidence
How it compares in trials
Average weight loss % — from individual phase 3 trials
Is this right for you?
Who this tends to fit
Relevant if you
- You want a pill with no food or water timing restrictions
- You want to avoid injections entirely
- You prefer a once-daily pill over weekly shots
- You are looking for an affordable GLP-1 option ($149–$349/month)
Not right if you
- You want more weight loss than orforglipron's own trials have shown
- You have heart disease and want a drug that's also proven to protect your heart (semaglutide has that data)
- You have a personal or family history of medullary thyroid cancer
- You are pregnant or planning to become pregnant
Safety
Important cautions
- Do not use if you or anyone in your family has had a rare thyroid cancer called MTC, or a condition called MEN 2
- Report persistent severe stomach pain — this could mean your pancreas is inflamed
- Tell your doctor about all medications — dose adjustments may be needed for some diabetes drugs
Read the boxed warning explained in full. See what the label says about pregnancy and breastfeeding.
Practical guide
How to take Foundayo
Take one tablet daily — any time of day, with or without food. No fasting window required.
Starting dose is 0.8 mg. The label has you stay on each of the first three doses (0.8 mg, 2.5 mg, 5.5 mg) for at least 30 days. Your doctor can then raise it to 9, 14.5 or 17.2 mg, the maximum.
Store at room temperature. No refrigeration needed.
Do not crush, chew, or break the tablet — swallow whole.
Common questions
FAQ
For the full regain timeline, week by week, see what the trials found after stopping.
Questions to ask your doctor
- →Am I a good candidate given my health history and any other conditions I have?
- →Do I have any contraindications I should know about?
- →What results should I realistically expect, and over what timeframe?
- →Which side effects should make me contact you?
- →How long should I try this before we decide if it's working?
- →What happens if I need to stop — how do I come off it safely?
Written and maintained by one person · Built with agentic AI tools · Every number checked against the cited trial · Not medical advice
Sources & references
- [1]ATTAIN-1Adults with obesity or overweight with comorbidities, no type 2 diabetes · 72 weeks12.4% mean weight loss at the highest dose studied (36 mg of the trial capsule, shown in the FDA label as the equivalent 17.2 mg tablet). 59.6% achieved ≥10% loss. Nausea 29–36% vs. 10% placebo; vomiting 13–24% vs. 4% placebo.New England Journal of Medicine (2025) ↗
- [2]ATTAIN-2Adults with obesity and type 2 diabetes · 72 weeks10.5% weight loss at highest dose. HbA1c reduced by 1.8%. Consistent GI safety profile with injectable GLP-1 class.The Lancet (2025) ↗
- [3]ATTAIN-MAINTAIN (transition from injectable)Adults switching from Wegovy or Zepbound to orforglipron · 52 weeksWeight maintained following switch — average difference of 0.9 kg vs. those continuing injectable GLP-1. All primary endpoints met.Eli Lilly press release (2025) ↗