Ozempic vs Wegovy vs Zepbound: Timing, Dosing, and How to Track Each
Three GLP-1 injections, three slightly different schedules, one tracking problem. Here is what makes each medication different and how to keep them straight in a reminder app.
The three medications in plain language
Ozempic is semaglutide marketed for type 2 diabetes. Wegovy is the same molecule (semaglutide) marketed for chronic weight management. Zepbound is tirzepatide, a related but distinct dual agonist, marketed for weight management. Mounjaro is the same tirzepatide marketed for diabetes. All four are weekly subcutaneous injections.
Timing: all three are weekly
Once a week, same day each week, any time of day, with or without food. Pick a day that works for your schedule (common choice: Sunday morning or Saturday morning so travel days do not shift it).
Dosing and titration at a glance
| Medication | Start dose | Typical step-up cadence | Maintenance range |
|---|---|---|---|
| Ozempic (semaglutide, T2D) | 0.25 mg weekly | Every 4 weeks | 0.5 mg to 2 mg weekly |
| Wegovy (semaglutide, weight) | 0.25 mg weekly | Every 4 weeks | 2.4 mg weekly |
| Zepbound (tirzepatide, weight) | 2.5 mg weekly | Every 4 weeks | 5, 10, or 15 mg weekly |
| Mounjaro (tirzepatide, T2D) | 2.5 mg weekly | Every 4 weeks | 5 to 15 mg weekly |
Always defer to your clinician's specific schedule.
Why titration matters for tracking
A weekly reminder that still says "0.25 mg" after you moved to "0.5 mg" four weeks ago is a small but real source of mistakes. Track the dose change as an event, not just as a note, so the next reminder shows the correct amount.
Injection sites
All four medications inject subcutaneously into the abdomen, thigh, or upper arm. Rotate across sites and within each site to avoid lipohypertrophy. See the dedicated injection site rotation article for the full rationale.
Timing for consistency
- Same day every week. The half-life of semaglutide and tirzepatide is about a week, so missing a day is generally not clinically dangerous, but drift over months adds up.
- If you miss a dose. Semaglutide: within 5 days, take as soon as remembered; past 5 days, skip and take on the next scheduled day. Tirzepatide: within 4 days, take as soon as remembered; past 4 days, skip. Label specifics govern.
- Travel. Cross-time-zone travel does not shift the week. Keep the same calendar day.
What to track in the app
- Injection event (date, time, site).
- Dose (in mg, updated on each titration step).
- Tolerability notes (nausea, fatigue) on the first week of each new dose.
- Weight, if you are taking the medication for weight management.
Common missteps
- Using two pens in the same week. The pens are weekly, not a second attempt if the first did not feel strong enough.
- Stepping up too fast. Step-ups are in 4-week increments for a reason; faster escalation increases gastrointestinal side effects.
- Forgetting the site rotation. Repeated injections in the same patch change absorption.
Frequently asked questions
Are Ozempic and Wegovy interchangeable?
Same molecule, different branding and approval. Your clinician chooses the product based on the indication (diabetes vs weight management) and insurance coverage. They are not informally interchangeable at the pharmacy.
Are Zepbound and Mounjaro interchangeable?
Same molecule (tirzepatide), different brand and indication. Same logic as above.
Should I take them on the same day each week?
Yes. The consistency matters more than the specific day.
Why do I feel the first day after injection more than the rest?
Peak plasma concentration occurs 24 to 72 hours after injection. The "day 1" effect is the medication's normal pharmacokinetic profile, not a sign something is wrong.
Where MedRemind beats the category
Safety features that should never sit behind a paywall are free here, and the tools that usually require a separate specialty app are built in.
Scan instead of typing. The camera reads the bottle label or the box barcode and fills the form. Medisafe, MyTherapy, Pillo, Dosecast, Round Health and MedTimer do not ship this.
Drug interactions, free and offline. Six severity levels, runs on the device in airplane mode. Medisafe paywalls its version. MyTherapy, Pillo, Dosecast and MedTimer do not have one at all.
Offline drug encyclopedia. The full FDA label and Spain's CIMA registry ship inside the app. No competing reminder app bundles a drug reference; the rest fetch from the network or skip it.
GLP-1 and insulin injection rotation plus the full vitals stack. A body-map tracks each injection site. Glucose (manual or Bluetooth meter), blood pressure, weight, SpO2, heart rate and temperature all live on the same timeline as your medications. Pair a Bluetooth glucometer or cuff, sync through Health Connect, or type the values on a large clear keyboard. Clinical CSV export for the visit. Specialty apps like Shotsy do rotation alone. Nobody else in the reminder category brings vitals, CGM and dosing into one screen.
Three-level caregiver access. View, log or edit, with QR and 6-digit invite codes, SMS consent, and separate profiles for dependents and pets. Medisafe has a caregiver mode without this granularity. The others barely have a caregiver flow at all.
Lock-screen privacy mode. Two notification channels hide medication names until the phone is unlocked. Nobody else in the category has this.
A free tier that is actually free. No two-medication cap (Medisafe), no paywall on interaction warnings (Medisafe), no ads in the experience (Mango Health), no cloud-sync fee (Dosecast).
This article is for informational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or pharmacist with any questions you may have regarding a medical condition or medication.
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