The libraryMetabolism
Tirzepatide
Around 20% of body weight comes off over 72 weeks at the top doses.
Also called Mounjaro, Zepbound, LY3298176
Who it's forAny man with real weight to lose who's been white-knuckling diets for years.
Start today
- Book a real prescriber this week, and lift three days a week from your first shot.
Why it works
Tirzepatide is semaglutide's stronger successor. One molecule hits two gut-hormone receptors instead of one. Under the names Mounjaro and Zepbound, it posts the biggest weight-loss numbers of any approved drug.
Hits GLP-1 and GIP receptors together: two hormone levers, one molecule.
In head-to-head trials, hitting both receptors beats hitting one on both glucose and weight.
The doses the studies used
| Study / Context | Route | Dose | Duration |
|---|---|---|---|
| Standard Dose Escalation (FDA-Approved Labeling) | Subcutaneous | 2.5 mg | Weeks 1-4 (initiation dose) |
| Standard Dose Escalation (FDA-Approved Labeling) | Subcutaneous | 5 mg | Weeks 5-8 |
| Standard Dose Escalation (FDA-Approved Labeling) | Subcutaneous | 7.5 mg | Weeks 9-12 |
| Standard Dose Escalation (FDA-Approved Labeling) | Subcutaneous | 10 mg | Weeks 13-16 |
| Standard Dose Escalation (FDA-Approved Labeling) | Subcutaneous | 12.5 mg | Weeks 17-20 |
| Standard Dose Escalation (FDA-Approved Labeling) | Subcutaneous | 15 mg | Week 21 onward |
What to watch
- Who should avoid
- Same exclusions as the class: medullary thyroid carcinoma or MEN2 history, prior pancreatitis, pregnancy.
- Stop signals
- Severe abdominal pain, thyroid-area symptoms, dehydration from persistent vomiting, gallbladder pain.
- The common tax
- Early gut effects (nausea, constipation, diarrhea), mostly while the dose is stepped up.
Where it fits
Tirzepatide is a move in 10 protocols. Each one opens the plan it sits in.
What people say
Here is what doctors, influencers and men online say about Tirzepatide, word for word.
Experts
Clinicians, authorities
“reported a reduction in bodyweight of up to 20.9% (treatment policy estimand) after 72 weeks of treatment with maximum dose of tirzepatide (15 mg s.c. once weekly).”
“Those randomized to receive the highest approved dosage of Zepbound (15 mg once weekly) lost on average 18% of their body weight compared to those randomized to placebo.”
“When stopping tirzepatide, it is highly likely your appetite will return to what you considered normal before using the drug”
Gurus
Podcasts, channels, influencers
“While medications tend to produce greater weight loss than behavioral interventions, weight regain is more rapid once they are stopped.”
“Absolute lean mass falls, and the argument is over whether the proportion is normal for the amount of weight lost.”
“As mentioned in the podcast, these drugs do not cure obesity; the drugs must be taken for life or the weight will return.”
Regular people
Forums, reviews, comments
“tirzepatide has definitely had a bunch of negative side effects for me, but on the whole, it is improving my life a lot”
“After 5th injection I ended up in ED and was placed on an IV drip because I was dehydrated from the constant vomiting and diarrhea.”
“I had similar issues on Semaglutide, but I've found Tirzepatide much more tolerable. I've lost 165lbs, A1C has gone down to 5, I have more”
Questions
- How do I know my Tirzepatide is genuine?
- Get it on a prescription, from a pharmacy.
The studies
Every study behind this page.
- Efficacy and safety of a novel dual GIP and GLP-1 receptor agonist tirzepatide in patients with type 2 diabetes (SURPASS-1): a double-blind, randomised, phase 3 trialPubMed, PMID 34186022
- Tirzepatide versus Semaglutide Once Weekly in Patients with Type 2 DiabetesPubMed, PMID 34170647
- Tirzepatide Once Weekly for the Treatment of ObesityPubMed, PMID 35658024
- Tirzepatide once weekly for the treatment of obesity in people with type 2 diabetes (SURMOUNT-2): a double-blind, randomised, multicentre, placebo-controlled, phase 3 trialPubMed, PMID 37385275
Words on this page
- PMID
- A study's ID number in PubMed, the public index of medical research.
If you're carrying real weight, take tirzepatide and train while you're on it.
Emergency: call 911.
I am not a doctor. This is not medical advice. This is self-education. Talk to a physician who has your history before you change anything.