How to Inject Wegovy: a Step-by-Step Guide for First Timers

Step 1: Prepare, everything before the needle goes near your skin

Take your Wegovy pen out of the fridge and let it sit at room temperature for about 30 minutes. Cold medicine can sting more, and a slightly warmer pen is simply more comfortable. Wash your hands thoroughly with soap and water. Check the label confirms it is your prescribed dose, and look at the liquid through the pen window, it should be clear and colourless. Do not use the pen if the liquid looks cloudy, discoloured, or contains visible particles.

Attach a fresh needle. Remove the paper tab, press the needle cap straight onto the pen tip and twist until it is secure, then pull off the outer cap and the inner needle cap. Discard both caps. Using a new needle for every injection is not optional hygiene theatre, a used needle can clog and deliver less medicine than you expect. Wipe the chosen skin site with an alcohol swab and let it dry completely before you proceed; injecting into wet skin increases stinging.

Choose your site: the abdomen (at least 5 cm from the navel), the front of the thigh, or the outer upper arm. Rotate the exact spot each week, returning to the same patch of skin repeatedly can cause lumps under the surface that affect absorption. If you want more detail on using the thigh specifically, there is a practical walkthrough for thigh injections that covers what to expect.

Step 2: Inject, the technique that matters

Pinch a fold of skin gently between two fingers. This lifts the subcutaneous fat layer away from the muscle beneath, which is exactly where Wegovy needs to go. Hold the pen perpendicular to the skin, 90 degrees. Press the pen body firmly against the pinched skin and push the injection button (on most Wegovy pens this is the large button at the top).

You will hear or feel a click. Keep the button pressed and hold the pen still. Count slowly to ten. This pause is not ceremonial, it allows the full dose to be delivered before you withdraw. Some people rush this step and then notice liquid on the skin after removing the pen, which can mean the dose was incomplete. Slow and steady wins here.

Release the button, then lift the pen straight away from the skin. Do not rub the area afterwards. A small red mark or a brief sting is normal. If you see a drop of liquid on your skin immediately after removing the pen, read that linked guide, it explains what to do and when it matters. For a fuller overview of the self-injection process including what to expect week by week, the guide on how to self-inject Wegovy goes into more depth.

Step 3: After the injection, disposal and what to watch for

Recap the outer needle cap carefully (never recap with the inner cap removed and your fingers near the tip), then unscrew and discard the needle safely into a rigid sharps container. Standard household bins are not appropriate for used needles. A 1-litre sharps bin is the right size for most people on weekly injections at home, and your local council or pharmacy can advise on collection.

Return the pen to the fridge promptly. The storage window at room temperature is limited, always check the Patient Information Leaflet that came with your pen for the exact number of days permitted outside refrigeration. The NHS semaglutide medicines page also summarises storage guidance and common side effects in plain language.

The side effects most commonly reported around injection time are gastrointestinal: nausea, loose stools, or an unsettled stomach, particularly in the first day or two after each dose. These tend to ease as your body adjusts. More serious symptoms (severe abdominal pain that spreads to your back, signs of a significant allergic reaction, or any symptom that feels urgent) need prompt medical attention. Your prescriber and the Patient Information Leaflet are the right sources for a full list. The NHS England guidance on weight-management injections also includes advice on when to seek help during treatment.

Record the date of each injection, the same day each week works best for consistency. If you are unsure whether Wegovy is the right option for you, or want to understand how it compares to other licensed treatments, the weight-loss treatment overview is a useful starting point.

Practical questions that come up after the first few injections

Can you inject into your leg if the abdomen feels uncomfortable? Yes, the thigh is a licensed injection site and many people prefer it. The angle and hold-time are identical to the abdomen method above. What changes is the pinch: the thigh requires a firmer fold because the skin there can be thinner over the muscle.

What if you forget your weekly dose? Check how many days have passed. If your next scheduled dose is more than two days away, you can take the missed dose as soon as you remember and then return to your usual day. If the next dose is due within two days, skip the missed one and carry on. Never take two doses close together. For dosing questions specific to your prescription, your prescriber is the right person to ask, that is exactly the kind of thing the aftercare team at nume handles routinely.

Travelling with Wegovy is manageable with a little planning. The pen must stay refrigerated during transit wherever possible; an insulated cool bag works for shorter journeys. Room-temperature limits are in the leaflet. If you would like a step-by-step reminder of the physical technique before you travel, the guide on how to inject Wegovy is a straightforward reference to keep to hand. If you want a general overview of the medicine before or during treatment, the Wegovy treatment page covers the licensed background, clinical trial results, and how the NHS rollout currently works alongside private routes.