Wegovy 25 mg tablets once daily and Wegovy 2.4 mg injection once weekly are the matched pair. The prescribing information says so directly, in a section written for exactly this question, and it gives a different waiting period depending on which way you are going: one week after your last injection before the first tablet, but the very next day after your last tablet before the first injection. That asymmetry is the part people get wrong, and it is the part worth understanding before you switch.
The conversion, both directions
| Switching | From | To | When to start |
|---|---|---|---|
| Injection → tablet | Wegovy 2.4 mg once weekly | Wegovy 25 mg tablet once daily | One week after the last injection |
| Tablet → injection | Wegovy 25 mg tablet once daily | Wegovy 2.4 mg once weekly | The next day after the last tablet |
No re-titration in either direction. This is the one situation in GLP-1 dosing where you step straight onto the maintenance dose of the new form, because you are already at maintenance on the old one. Someone who has never been on Wegovy does not start here — they climb the ladder for their form, which is four monthly steps for the tablet and four four-week steps for the injection.
Why 25 mg of tablet equals 2.4 mg of injection
The ten-fold difference in the number is not a difference in the drug. It is the same semaglutide molecule in both products. What changes is how much of it survives the trip.
Injected under the skin, semaglutide has an absolute bioavailability of 89% — almost all of the dose reaches the bloodstream. Swallowed, even co-formulated with SNAC, the absorption enhancer that lets a peptide cross the stomach lining at all, bioavailability is approximately 1% to 2%. Roughly fifty times less of each milligram arrives. Multiply the dose by about ten and take it every day instead of weekly, and the arithmetic lands in the same place.
That is also why the administration rules for the tablet are strict rather than fussy: on an empty stomach, in the morning, with no more than four ounces of water, nothing else to drink, and at least thirty minutes before food or any other oral medication. At 1–2% absorption there is no margin. The mechanics of the molecule itself are in semaglutide's mechanism of action.
The part the equivalence hides
On average the two forms deliver almost exactly the same exposure. Average steady-state semaglutide concentration is 77 nmol/L on the 25 mg tablet and 75 nmol/L on the 2.4 mg injection. The label calls them comparable, and on the average it is right.
The spread is a different story. The same section reports that 90% of patients land between 27 and 186 nmol/L on the tablet, against 51 and 110 nmol/L on the injection. That is a range nearly three times wider. Two people on identical tablet prescriptions can be running very different drug levels, and neither of them will know it.
It follows from the absorption route. When 89% of a dose is absorbed, the 11% that is not cannot vary much. When 1–2% is absorbed, small differences — how empty the stomach really was, how much water, how long before breakfast — move the delivered dose by a lot. The rules exist to hold that variability down, and they only work if you follow them every day.
Practically, this means a switch to the tablet is not guaranteed to feel like a continuation. Some people will run higher than they did on the pen and meet side effects they had already left behind; others will run lower and wonder why the effect faded. Neither reaction means the conversion was done wrong.
If 25 mg is too much
The label anticipates this. If the 25 mg tablet is not tolerated, the documented option is Wegovy 1.7 mg injection once weekly rather than a smaller tablet held long-term — the lower tablet strengths of 1.5, 4 and 9 mg are titration steps, not maintenance doses.
There is a second case worth knowing if you have type 2 diabetes: if you are on the 25 mg tablet and need more weight reduction, the label directs a switch to the 1.7 mg injection followed by the normal escalation schedule, rather than staying oral. Both routes are decisions for the clinician holding your history, not choices to make at the pharmacy counter.
Why the waiting periods are not symmetrical
The obvious explanation is wrong, so it is worth ruling out. It is not that the injection lingers and the tablet clears quickly. Semaglutide has an elimination half-life of about one week whichever way it goes in, and the label states it stays in circulation for five to seven weeks after the last dose — injection or tablet alike.
What differs is the size of the last dose you took. Stopping the weekly injection leaves you holding a full week's worth that has only just been given; starting daily tablets on top of it would stack one maintenance dose on another. Waiting a week means the tablets begin roughly when the next injection would have been due. Going the other way, your last tablet was a single day's dose, so a weekly injection the following day adds to very little.
The same logic explains the long tail on stopping altogether. Five to seven weeks of residual drug is also why the label instructs anyone planning a pregnancy to discontinue at least two months beforehand.
What the switch does not change
- The boxed warning. Both forms carry the thyroid C-cell tumour warning, and the same contraindications for personal or family history of medullary thyroid carcinoma or MEN 2.
- The approvals. Both the 25 mg tablet and the 2.4 mg injection are approved for weight reduction and for cardiovascular risk reduction in adults.
- The molecule. Nothing about the drug's behaviour changes. What changes is delivery, schedule and predictability.
What does change is the practical texture: a weekly appointment with a pen becomes a daily thirty-minute fasting window before breakfast. People switch in both directions for that reason as often as for any clinical one. If the needle is the objection, see how to inject Wegovy before deciding — and if it is the price, the tablet and the pen are not on the same tier, which is covered in Wegovy cost without insurance.
How this differs from the Rybelsus conversion
The other semaglutide conversion people search for is Rybelsus to Ozempic, and it does not work the same way. That one has no clean official equivalence for weight, involves a product being discontinued, and crosses between a diabetes tablet and a diabetes injection at doses never designed for weight management.
This conversion is the tidier case: one brand, two presentations, both approved for the same indications, with the equivalence written into the label. If you are on Rybelsus rather than Wegovy tablets, that is the page you want, not this one.
Scientific References
2 sources- 1
Novo Nordisk
WEGOVY (semaglutide) injection and WEGOVY (semaglutide) tablets — Highlights of Prescribing Information, §2.2 Table 1, §2.3 Table 2, §2.5 Switching Between WEGOVY Injection and WEGOVY Tablets, §3, §12.3
DailyMed, U.S. National Library of Medicine · 2026
NIH - 2
Wilding JPH, Batterham RL, Calanna S, et al.
Once-Weekly Semaglutide in Adults with Overweight or Obesity (STEP-1)
New England Journal of Medicine · 384(11) · 2021PMID: 33567185
NEJM
References open in a new tab. Content is reviewed against peer-reviewed literature as part of our editorial policy.
About the author
Editor, Modern Weight Science
Claudiu Gheorghe is the editor of Modern Weight Science. He is not a physician. His role is to synthesize peer-reviewed studies, clinical-trial data, and FDA prescribing information into clear, plain-language explanations, and to make sure every factual claim on the site traces back to a cited source. Any decision about starting, changing, or stopping a medication belongs with a licensed clinician who knows your history.
Every claim is checked against peer-reviewed research through our review process and fact-checking policy.
Frequently Asked Questions
What Wegovy pill dose is equal to the 2.4 mg injection?
Wegovy 25 mg tablets once daily. The prescribing information treats the 25 mg tablet and the 2.4 mg once-weekly injection as the matched maintenance pair, and patients switching between them move straight to the new form's maintenance dose without re-titrating. The lower tablet strengths — 1.5, 4 and 9 mg — are titration steps rather than maintenance doses.
How long should I wait between the last injection and the first pill?
One week. The label says to initiate 25 mg tablets once daily one week after discontinuing the 2.4 mg injection. Going the other direction the wait is much shorter: start the 2.4 mg injection the day after the last tablet. The difference is the size of the final dose — a weekly injection is a full week's worth still in circulation, while a tablet is one day's.
Why is the pill 25 mg when the injection is only 2.4 mg?
Because almost none of a swallowed dose gets in. Semaglutide has an absolute bioavailability of about 89% injected subcutaneously and approximately 1% to 2% taken orally, even co-formulated with the absorption enhancer SNAC. About ten times the milligrams taken daily rather than weekly lands at a comparable exposure. It is the same molecule in both products.
Is the Wegovy pill really equivalent to the injection?
On average, yes: average steady-state concentration is roughly 77 nmol/L on the 25 mg tablet against 75 nmol/L on the 2.4 mg injection. But the tablet is far less consistent between people. The label reports 90% of patients between 27 and 186 nmol/L on the tablet versus 51 and 110 nmol/L on the injection — a range nearly three times wider — which is why the empty-stomach, small-sip-of-water, wait-30-minutes rules matter so much.
What if I cannot tolerate the 25 mg tablet?
The documented option is switching to Wegovy 1.7 mg injection once weekly, rather than staying on a lower tablet strength. There is a separate instruction for people with type 2 diabetes who need more weight reduction while on 25 mg tablets: switch to the 1.7 mg injection and follow the standard escalation schedule. Both are clinician decisions.
Do I need to re-titrate when I switch?
No, not when switching between the maintenance doses of the two forms. That is the point of the equivalence: you step from 2.4 mg injection to 25 mg tablet, or back, without climbing the ladder again. Re-titration applies to anyone starting Wegovy for the first time, or restarting after a long gap, which is a decision for your prescriber.
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Not medical advice. This guide is for general education only. GLP-1 medications, dosing, and treatment suitability are decisions for you and a licensed clinician who knows your full medical history.