How Long Does a Wegovy Pen Last?

Wegovy is a prescription-only injection for overweight and obese adults. Like with any medication, if you’re looking to use Wegovy as part of your weight loss program, you may be wondering how long a Wegovy pen will last.

The pen is pre-filled with 4 doses, ensuring each pen lasts for 4 weeks. In this article, we’ll explore how long each pen lasts and the dosage schedule in more detail.

How long does a Wegovy pen last?

Each Wegovy pen contains 4 doses of medication at the prescribed strength. Because Wegovy is administered once a week, each pen will last for approximately 4 weeks, and each dose will remain effective for several days. In total, there are 5 different doses. 

When you first start Wegovy, you’ll be prescribed the lowest dose, which will increase every 4 weeks until you reach the maintenance dose of 2.4 mg per week or whichever dose is most suited to you.

Wegovy dosage schedule

The typical Wegovy dose is shown below:

The dosage schedule is usually:

What is the Wegovy maintenance dose?

Although everyone will start at the lowest dose, the maintenance dose will not always be 2.4mg per week. Some people may prefer to stick to the lower 1.7mg per week dose as their maintenance dose.

It may be better to stick to the lower dose if you experience side effects or find it ineffective. Your clinician will discuss with you which dose should be your maintenance dose.

How long should the first Wegovy pen last me?

Each pen contains 4 prefilled doses, so each pen will last for 4 weeks.

Can I increase my dose early?

No, you should not increase your Wegovy dose early unless your healthcare provider has advised you to do so. Increasing your dose early could cause side effects.

How long does a Wegovy pen last at the maintenance dose?

Whether you are prescribed a maintenance dose of 1.7 or 2.4 mg per week, each pen will last for four weeks.

While you remain on the maintenance dose, you will need a new pen every 4 weeks to continue with your dosage schedule.

How long can you store a Wegovy pen?

How to store your pen will depend on whether you have started using it.

Before using your Wegovy pen, you should store the unused injection in its box in the fridge. The ideal refrigerator temperature should be between 2 °C and 8 °C.

The Wegovy pen can be stored for up to 6 weeks when in use. The Wegovy pen can be stored at a temperature below 30 degrees Celsius or in a refrigerator at a temperature between 2 and 8 degrees Celsius.

If you’re unsure about how to store your Wegovy pen, read the patient information leaflet.

Where can I buy Wegovy online?

You can buy Wegovy online from Prescription Doctor. You’ll need to:

• Complete a short online medical questionnaire.
• Purchase your preferred treatment.
• One of our clinicians will review your order and the answers to the questionnaire to see if your requested treatment is suitable for you.
• If approved, your treatment will be delivered to your address in discreet packaging.
• If our clinician determines that it is not suitable for you, you will receive a full refund as part of our money-back guarantee.

When should I request my next Wegovy pen?

Because you will be increasing your dose every 4 weeks or 28 days, it is recommended that you order your next pen well in advance to ensure a continuous treatment schedule.

To order the next dose, you will need to complete another online medical consultation, allowing our clinicians to assess whether it is appropriate for you to increase your dose. You can start your consultation here.

Summary

Overall, Wegovy pens should last for approximately 4 weeks if used as prescribed. However, it can depend on the dose prescribed and when the clinician feels it's appropriate for you to increase your dose.

Authored & Reviewed By

Mohamed Imran Lakhi

MPharm - Lead Pharmacist

Imran Lakhi is the superintendent pharmacist and founder at Prescription Doctor. He has been at the core of our team.

Published on: 14/09/2023 Reviewed on: 05/06/2025