Wegovy (Semaglutide) Injection

What Is Wegovy?

Wegovy is the brand name for a onceweekly injectable formulation of semaglutide, a glucagonlike peptide1 (GLP1) receptor agonist. While semaglutide is also sold under the name Ozempic for type2 diabetes, Wegovy is specifically indicated for chronic weight management in adults with obesity (BMI30kg/m) or overweight (BMI27kg/m) who have at least one weightrelated condition such as hypertension, type2 diabetes, or dyslipidemia.

How Does It Work?

Semaglutide mimics the action of the natural hormone GLP1. Its main mechanisms are:

• Appetite suppression: Activates GLP1 receptors in the brain, increasing feelings of fullness and reducing hunger.
• Slowed gastric emptying: Food stays longer in the stomach, contributing to satiety.
• Improved glucose control: Enhances insulin secretion and reduces glucagon release, which also helps many patients with type2 diabetes.

The combined effect typically results in an average loss of 1015% of body weight after 68weeks of treatment when paired with a reducedcalorie diet and regular physical activity.

Dosage and Administration

Wegovy is supplied as a prefilled, singleuse pen containing 0.25mg of semaglutide. The dose is gradually increased over 16weeks to minimize gastrointestinal side effects:

1. Week14: 0.25mg once weekly
2. Week58: 0.5mg once weekly
3. Week912: 1mg once weekly
4. Week1316: 1.7mg once weekly
5. Week17 onward: 2.4mg once weekly (maintenance dose)

Injections are given subcutaneously in the abdomen, thigh, or upper arm. Rotate injection sites to avoid irritation.

Effectiveness

Key findings from the STEP (Semaglutide Treatment Effect in People with Obesity) clinical program:

• Mean weight loss of 14.9% (15kg) after 68weeks compared with 2.4% loss with placebo.
• Significant improvements in waist circumference, blood pressure, triglycerides, and HbA1c.
• Benefits persisted for at least one year after the study period when participants continued therapy.

Realworld data suggest that many patients who stay on Wegovy for a full year see clinically meaningful weight reductions that translate into reduced risk of cardiovascular disease and improved quality of life.

Common Side Effects

Gastrointestinal symptoms are the most frequently reported adverse events:

• Nausea (up to 30% of users)
• Vomiting
• Diarrhea
• Constipation
• Abdominal discomfort

Most side effects are mild to moderate and tend to resolve within the first few weeks as the dose is titrated. Hydration, small frequent meals, and a gradual increase in dietary fiber can help manage these symptoms.

Safety Considerations

Before starting Wegovy, a healthcare professional should evaluate the patient for the following:

• Personal or family history of medullary thyroid carcinoma (MTC) or multiple endocrine neoplasia type2 (MEN2): GLP1 agonists are contraindicated.
• Pregnancy or breastfeeding: Not recommended; discuss alternative options.
• Severe gastrointestinal disease: May worsen symptoms.
• Kidney function: Dose adjustments are not required, but monitor in patients with renal impairment.

Rare but serious adverse events include pancreatitis, gallbladder disease, and hypersensitivity reactions. Seek immediate medical attention if you experience severe abdominal pain, persistent vomiting, or signs of an allergic reaction (rash, swelling, difficulty breathing).

Interaction with Other Medications

Semaglutide can slow gastric emptying, which may affect the absorption of oral medications. Counsel patients to take other oral drugs at least 30minutes before or 1hour after the injection. No dose adjustments are required for:

• Metformin
• Statins
• Antihypertensives (ACE inhibitors, ARBs, betablockers)

However, inform the prescriber of any ongoing therapy, especially insulin or sulfonylureas, as hypoglycemia risk may increase when combined with semaglutide.

Practical Tips for Patients

• Keep a injection log: Record the day, time, and site of each dose.
• Store pens properly: Unopened pens refrigerator (28C). Once opened up to 30days at room temperature, not exceeding 30C.
• Do not share pens: Each pen is for a single individual.
• Follow a balanced diet: Pair medication with a caloriecontrolled diet rich in vegetables, lean proteins, and whole grains.
• Stay active: Aim for at least 150minutes of moderateintensity activity per week.

Cost and Insurance

Wegovy is a premium medication; the wholesale acquisition cost in the United States exceeds $1,300 for a 28day supply. Many insurance plans cover it under specialty drug benefits, often requiring prior authorization and documentation of BMI criteria. Patient assistance programs are available through the manufacturer for eligible individuals.

Frequently Asked Questions

Can I use Wegovy if I already take Ozempic?

No. Both contain semaglutide; using both would lead to an excess dose. Discuss with your provider which formulation best fits your condition.

How quickly will I see results?

Weight loss usually becomes apparent after the first 812weeks, with the most rapid reductions occurring during the doseescalation phase.

Is Wegovy safe for seniors?

Clinical trials included participants up to 75years old. Older adults should be monitored closely for dehydration and kidney function, especially if gastrointestinal side effects are prominent.

Can I inject myself?

Yes. The pen is designed for selfadministration with a simple mechanical clickandinject mechanism. Training is provided by the prescribing clinic.

What should I do if I miss a dose?

Take the missed injection as soon as you remember, provided it is within 5days of the scheduled date. If more than 5days have passed, skip the missed dose and resume the regular weekly schedule. Do not doubledose.

Bottom Line

Wegovy (semaglutide) is a powerful, onceweekly GLP1 receptor agonist that offers clinically significant weight loss when combined with lifestyle modifications. Its efficacy, however, must be balanced against common gastrointestinal side effects and the need for longterm adherence. Proper patient selection, education, and monitoring are essential to maximize benefits while minimizing risks.

For personalized advice, always consult a qualified healthcare professional.