Wegovy® (semaglutide) – 1 mg per 0.5 mL
Wegovy is a prescription medication approved by the FDA for chronic weight management in adults with obesity (BMI ≥ 30 kg/m²) or overweight (BMI ≥ 27 kg/m²) who also have at least one weight‑related comorbidity (e.g., type 2 diabetes, hypertension, dyslipidemia). It’s the same active ingredient as the once‑daily injection for type 2 diabetes (Ozempic®), but the dosing schedule and formulation are tailored for weight loss.
1. How it’s delivered
| Form |
Volume |
Dose per injection |
Frequency |
| Single‑dose pen |
0.5 mL |
1 mg |
Once a week |
| Pre‑filled 0.5 mL cartridges (used with the pen) |
– |
– |
– |
The pen is pre‑filled with a single 1 mg cartridge (0.5 mL) so you only inject once weekly. The first injection is given in the clinic under supervision, and thereafter you self‑inject at home.
2. Typical titration schedule
Because semaglutide can cause gastrointestinal side effects (nausea, vomiting, diarrhea), the dose is increased gradually:
| Week |
Dose |
Total cumulative weekly dose |
| 1 |
0.25 mg |
0.25 mg |
| 2 |
0.25 mg |
0.5 mg |
| 3 |
0.5 mg |
0.5 mg |
| 4 |
0.5 mg |
1.0 mg |
| 5 |
1.0 mg |
1.0 mg |
| 6+ |
1.0 mg |
1.0 mg |
The 1 mg dose is the maintenance dose. If tolerated, a higher dose (up to 2.4 mg) may be used in a subsequent phase, but the 1 mg dose is the standard maintenance level for most patients.
3. What to expect
| Category |
Typical experience |
| Efficacy |
Average weight loss: ~5–10 % of baseline body weight over 68 weeks when combined with diet & exercise. |
| Side effects |
• Nausea, vomiting, diarrhea, constipation, abdominal pain (often most prominent during dose titration).
• Decreased appetite.
• Injection site reactions (redness, itching).
• Rarely, pancreatitis or gallbladder disease. |
| Contraindications |
• Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia syndrome type 2 (MEN 2).
• Known hypersensitivity to semaglutide. |
| Drug interactions |
• Slows gastric emptying, which can affect absorption of oral medications taken simultaneously (e.g., levothyroxine, oral contraceptives).
• No major interactions with most other drugs, but always discuss all medications with your provider. |
| Monitoring |
• Weight loss progression (every 4–12 weeks).
• Blood glucose if you have diabetes.
• Thyroid function tests (if clinically indicated). |
4. Practical tips for use
-
Injection technique
- Rotate injection sites (abdomen, thigh, upper arm).
- Use a new needle each time; the pen has a safety needle guard.
- Follow the “prime the pen” step before the first injection.
-
Timing
- Take it at the same time each week.
- Can be taken with or without food, but consistency helps.
-
Managing nausea
- Take the pen after a light meal or snack.
- If nausea persists, talk to your prescriber; they may slow the titration.
-
Storage
- Store in the refrigerator (2–8 °C) before first use.
- Once removed from the fridge, keep at room temperature for up to 30 days.
- Do not freeze.
-
Lifestyle
- Combine with a reduced‑calorie diet (≈500 kcal/day deficit) and regular physical activity.
- Expect most weight loss in the first 3–6 months; maintenance is key.
5. Common questions
| Question |
Answer |
| Is 1 mg the same as Ozempic? |
Ozempic’s dosing schedule is 0.25 mg weekly for diabetes; Wegovy’s maintenance dose is 1 mg weekly. The active ingredient is the same, but the indications differ. |
| Can I use it if I’m not overweight? |
No, it’s approved only for weight management in overweight/obese adults with comorbidities. |
| How long can I stay on Wegovy? |
No formal upper limit; many patients stay on it for 1–2 years or longer if weight goals are achieved and maintained. |
| Will I lose all my weight? |
Weight loss varies. The drug helps reduce appetite and slows gastric emptying, but lifestyle changes are essential for lasting results. |
| What if I miss a dose? |
Take the next scheduled dose as soon as possible. Do not double‑dose to catch up. |
6. Bottom line
- Wegovy 1 mg/0.5 mL is a weekly GLP‑1 receptor agonist used for weight management.
- It’s administered via a pre‑filled pen, once weekly, after a 4‑week titration period.
- Common side effects are mainly gastrointestinal and usually improve with time.
- It works best when paired with diet, exercise, and behavioral changes.
Important: Always consult your prescribing clinician for personalized advice, especially if you have other medical conditions or medications.