Wegovy 0.25 mg is the first weekly injectable starter dose of semaglutide 2.4 mg for weight loss. It is sub-therapeutic on purpose — the point of the 4-week starter step is to let the gastrointestinal system adapt to GLP-1 signaling before the higher weight-loss-active doses. Expected weight loss at 0.25 mg is modest (1 to 3 percent), and side effects are usually mild. After 4 weeks, most patients titrate to 0.5 mg, then to 1.0, 1.7, and 2.4 mg over a total of 16 to 20 weeks.
The Full Wegovy Titration Schedule
| Week | Dose | Purpose |
|---|---|---|
| 1–4 | 0.25 mg | Starter — GI adaptation |
| 5–8 | 0.5 mg | Continued adaptation |
| 9–12 | 1.0 mg | Sub-maintenance; some weight loss |
| 13–16 | 1.7 mg | First labeled maintenance option |
| 17+ | 2.4 mg | Full maintenance dose |
Some patients take longer — extending 0.25 or 0.5 mg for an additional 4 weeks is safe and common if side effects are limiting.
What Happens in Your Body at 0.25 mg
At the starter dose, serum semaglutide reaches about one-tenth of the steady-state concentration at the 2.4 mg maintenance dose. The biological effects are correspondingly milder:
- Mild gastric emptying slow-down
- Some appetite regulation — smaller meals feel satisfying
- Small glucose-lowering effect (more relevant if type 2 diabetes co-exists)
- Modest weight loss from reduced intake
- Early GI side effects that will be worse at higher doses
Weight Loss at 0.25 mg: What Is Realistic
| Starting Weight | Expected Loss at 4 Weeks |
|---|---|
| 150 lb | 1.5–4.5 lb |
| 180 lb | 1.8–5.4 lb |
| 200 lb | 2–6 lb |
| 250 lb | 2.5–7.5 lb |
| 300 lb | 3–9 lb |
If you lose much more than this in 4 weeks, you are likely losing water or muscle — consider adequate protein and hydration. If you lose nothing after 4 weeks, discuss with your clinician but do not be discouraged; real weight loss acceleration happens after titration up.
Expected Side Effects at 0.25 mg
| Side Effect | Frequency at 0.25 mg | What Helps |
|---|---|---|
| Mild nausea | 15–25% | Small meals; ginger tea; ondansetron if severe |
| Fatigue | 10–15% | Hydration; earlier bedtime first week |
| Constipation | 10–15% | Fluids; fiber; daily walk; MiraLAX if needed |
| Injection-site mild irritation | 5–10% | Rotate sites; cold pack before injection |
| Headache | 5–10% | Hydration; acetaminophen |
| Diarrhea | 5–8% | Bland diet; loperamide if severe |
| Lightheadedness | 3–5% | Fluids; electrolyte drinks |
Severe side effects at 0.25 mg are uncommon. If vomiting is daily, abdominal pain is severe, or you cannot maintain hydration, call your clinician.
Injection Technique (Refresher)
- Take the pen out of the fridge 15 to 30 minutes before injection — cold insulin stings more
- Wash hands; clean site with alcohol wipe
- Attach a fresh needle; remove both caps
- Choose a site — abdomen (2 inches from navel), upper thigh, back of upper arm
- Pinch skin gently; insert perpendicular
- Press and hold the button until the window shows “0” and count to 6 before withdrawing
- Do not massage the site
- Dispose of the needle in a sharps container
Storage Rules
- Unopened: refrigerate (36–46°F / 2–8°C); do not freeze
- In use: up to 28 days at room temperature under 86°F (30°C), or continued refrigeration
- Protect from direct light
- Discard pens left at higher temperatures or frozen
What to Do Between Week 1 and Week 4
- Track what you eat — portion awareness builds
- Aim for protein 20 to 30 g per meal to preserve muscle as weight drops
- Hydrate — 2 to 3 liters per day, more if active
- Walk 30 minutes most days
- Weigh in on the same morning, same scale, same clothing (weekly is enough)
- Keep a simple symptom diary — note anything that needed action
- Schedule your week-4 follow-up before starting
When to Stay Longer at 0.25 mg
- Persistent nausea interfering with eating
- Vomiting more than twice a week
- Unable to maintain hydration
- Lightheadedness or orthostatic symptoms
- Abdominal pain (mild only; severe needs evaluation)
- New or significant weight loss below your target range early in titration
When to Stop and Call Your Clinician
- Severe abdominal pain radiating to the back — possible pancreatitis
- Severe right upper quadrant pain — possible gallbladder issue
- Uncontrollable vomiting
- Signs of severe dehydration
- Allergic reaction — rash, swelling, breathing difficulty
- Chest pain or palpitations
Related Reading
See our companion guides on treatment, nutrition on GLP-1, and reversibility.
The Bottom Line
Wegovy 0.25 mg is the weekly starter dose, taken for 4 weeks, designed to let the GI system adapt before you move to higher weight-loss-active doses. Expect modest weight loss (1 to 3 percent) and mild side effects. After 4 weeks, titrate to 0.5 mg, then continue up the ladder toward 1.7 or 2.4 mg maintenance over 16 to 20 weeks. Stay at 0.25 mg longer only if side effects demand it; stay at 0.25 mg as maintenance only in narrow clinical circumstances — the real weight-loss benefits appear at the higher doses.
