Tirzepatide
medicationMounjaro · Zepbound
Metabolic medication (GIP / GLP-1 receptor agonist)
Research status · FDA-approved
FDA-approved. Mounjaro (type 2 diabetes, 2022) and Zepbound (obesity/overweight with a weight-related condition). Prescription only. Carries a Boxed Warning for thyroid C-cell tumors.
Tirzepatide is a prescription once-weekly injectable that activates two incretin receptors (GIP and GLP-1). It is approved and clinician-managed. People using it commonly track appetite, food tolerance, protein intake, and weight, because appetite and gastric emptying are strongly affected.
How it works
Dual GIP + GLP-1 receptor agonist. Slows gastric emptying, increases satiety, and improves glucose-dependent insulin response — reducing appetite and supporting glucose control.
Commonly discussed use cases
- Type 2 diabetes (Mounjaro)
- Chronic weight management (Zepbound)
Supposed / potential benefits
- Significant average weight reduction in trials
- Improved glycemic control (A1c) for type 2 diabetes
Common side effects
- Nausea, vomiting, diarrhea, constipation
- Reduced appetite, fatigue
- Injection-site reactions
- Risk of hypoglycemia when combined with insulin/sulfonylureas
Warnings & contraindications
- Boxed Warning: thyroid C-cell tumors seen in rodents; human relevance not determined
- Contraindicated with personal/family history of medullary thyroid carcinoma (MTC) or MEN 2
- Reports of pancreatitis, gallbladder issues, and ileus; can affect absorption of oral medications
Typical timing considerations
Once weekly, same day each week, any time of day, with or without food; dose is titrated up over months per the label.
Administration route
Subcutaneous injection (abdomen, thigh, or upper arm)
Storage
Refrigerate; per label may be kept at room temperature for a limited window. Protect from light.
Questions to ask your clinician
- What titration schedule am I on and what side effects warrant a call?
- How do I protect muscle and hit protein while appetite is suppressed?
- What labs/follow-up do you want, and how do I handle a missed dose?
Commonly tracked in Reta
Tracking fields organize user-entered, clinician-directed routines — Reta never recommends or computes doses.
Track this in Reta
Beta members get a ready-made tracker for Tirzepatide — schedule, dose log, injection-site rotation, reminders, and check-ins — for organizing a clinician-directed routine. Personal tracking is available to everyone during the Public Beta.
Reta is a tracking and education tool — not a medical provider. Nothing here is a diagnosis, treatment, prescription, or dosing recommendation. Peptides and medications should only be used under the direction of a licensed clinician. Talk to a qualified clinician before starting, stopping, combining, or changing anything. Many compounds below are not FDA-approved for human use; some are investigational or sold through unregulated channels where purity and dosing are not guaranteed.