Switching From Zepbound to Wegovy — What to Know and Track

The letter from your insurer says Zepbound is coming off your plan in January. Or maybe the side effects never quite settled, or your prescriber wants you on a medicine with a heart-risk indication. Either way, the next box will say Wegovy, and the first question most people ask is simple: what dose do I start on?

The honest answer is that your prescriber decides, and there's a good reason the label can't decide for them.

Why do people switch from Zepbound to Wegovy?

The reasons are usually practical rather than dramatic. A 2020 review of switching between GLP-1 medicines lists the common ones: side effects or tolerability, how well a medicine is working, a particular approved use, personal preference, and cost or insurance coverage.

Approved uses do differ. The Wegovy label covers weight reduction, cardiovascular risk reduction in certain adults, and a form of fatty liver disease called MASH. The Zepbound label covers weight reduction and obstructive sleep apnea. Wegovy also comes as a daily tablet; Zepbound is injection only.

Switching is common. A 2026 study of nearly 127,000 US adults without diabetes who started a GLP-1 found that about one in five switched to a different medicine within a year.

Is there a Zepbound-to-Wegovy dose conversion?

No. Zepbound is tirzepatide, which acts on two hormone receptors (GIP and GLP-1); Wegovy is semaglutide, which acts on one. Neither label gives an equivalent dose for the other, and the SURMOUNT-5 trial that compared them head to head didn't study people switching.

That's why you'll see wildly different numbers in forums. They're individual experiences, not a rule.

What do the two labels say about starting and stepping up?

Here's how each label describes starting from scratch. Your prescriber may follow it or adjust it for you.

	Zepbound (tirzepatide)	Wegovy injection (semaglutide)
Standard start	2.5 mg weekly for 4 weeks	0.25 mg weekly for weeks 1–4
How it steps up	2.5 mg steps, after at least 4 weeks on a dose	0.5 mg, 1 mg, 1.7 mg, each for 4 weeks
Maintenance for weight	5 mg, 10 mg or 15 mg	1.7 mg or 2.4 mg; up to 7.2 mg in some people
Missed dose	Take within 4 days, otherwise skip	Take if the next dose is more than 2 days away

Both labels say the slow climb is there to reduce stomach side effects. The Wegovy label also says that if a dose isn't tolerated during escalation, delaying the next step by 4 weeks can be considered.

Why might my prescriber start me low?

Because the label's escalation exists for a reason, and a new molecule is new to your body. The Wegovy label even advises that after two or more missed doses, restarting the escalation may reduce stomach side effects. The 2020 switching review notes that jumping straight to a higher dose of a new medicine can bring nausea and other stomach upset.

Starting lower can feel like losing ground. Many prescribers see it as the safer route. Ask yours how they're thinking about your starting point.

Both labels also say not to use them together with another GLP-1 receptor agonist. So the gap between your last Zepbound shot and your first Wegovy shot is planned on purpose.

What should I ask before the switch?

• When should I take my last Zepbound dose, and when my first Wegovy dose?
• Which Wegovy dose will I start on, and how quickly might we step up?
• What side effects should make me call you rather than wait?
• I'm on the pill — does anything change with contraception during the switch?
• Should I expect appetite or weight to change while I'm on the lower doses?

The contraception question matters. The Zepbound label advises people on oral hormonal birth control to switch to a non-oral method, or add a barrier method, for 4 weeks after starting and after each dose increase. The Wegovy label doesn't carry that advice, so check what applies during your changeover.

What we'd track

1. The handover dates. Your last Zepbound dose and first Wegovy dose, with strengths. Everything else is read against them.
2. Side effects day by day for the first few weeks. Nausea, constipation, heartburn and fatigue, rated simply. This shows whether the new medicine settles the way the old one did.
3. Appetite and food noise. Some people notice hunger returning on lower starting doses. Writing it down makes it a fact for your prescriber, not a worry.
4. Weekly weight trend. A line across both medicines is far more useful than daily readings during a change.
5. Meals and fluids. Protein and water slip easily when you're queasy again.

When your prescriber switches you, change the medication in Holt to Wegovy. Your Zepbound doses stay in your dose history, with strength, site and date, so both medicines sit in one record. Side effects line up against dose days, and the weight chart runs straight through the switch.

Log your switch to Wegovy in Holt

Before your follow-up, the doctor-visit report gathers the doses, symptoms and weight trend on one page. It turns "I think it's going fine" into something your prescriber can actually work with.