How to Use the Wegovy Pen: Step by Step From the Label, Plus the Problems the Label Does Not Cover

Written by Diana Gangan. Updated October 25, 2026.

Using the Wegovy pen takes about ten seconds: pull off the cap, press the pen firmly against your stomach, thigh or upper arm, hold it there through two clicks until the yellow bar in the window stops moving, then lift it off and throw the pen away. Each Wegovy pen holds exactly one dose, the needle is hidden and automatic, and there is nothing to dial or prime. The parts people get wrong are the ones the label mentions in passing: lifting the pen after the second click instead of waiting for the bar to stop, injecting into the same spot every week, and using a pen that has been out of the fridge too long.

This guide gives the steps from the official instructions for use, explains what the clicks and the yellow bar mean, and then answers the questions the manufacturer's page does not: what to do when the bar will not move, whether you can reuse a pen, how to handle a missed dose, and how to travel with it.

A Wegovy carton contains four single-dose pens of the same strength: 0.25 mg, 0.5 mg, 1 mg, 1.7 mg or 2.4 mg, plus 7.2 mg for Wegovy HD since March 2026. Each pen is a prefilled autoinjector with a built-in needle covered by a shield; you never see or handle the needle. There are no separate needles to attach and no priming step, which is the main difference from the multi-dose Ozempic pen that uses the same drug. The strength printed on the pen is the dose you receive; you cannot dial more or less.

Two clicks, one bar. The first click means the injection has started; the second means it is still going. Neither click means you are done. The only signal that the dose is complete is the yellow bar coming to a stop in the window. On the Wegovy pen the bar does not fill the entire window when finished, which confuses people who expect a full green bar as on some other pens. If you lift the pen while the bar is still moving, part of the dose stays in the pen and cannot be recovered.

Wegovy is injected under the skin, not into muscle. The three label sites are the front of the thigh, the lower abdomen (keep two inches from the navel) and the back of the upper arm, which usually needs another person. All three absorb the drug equally well. Rotate: you can use the same area every week, but move at least an inch from the last spot, because injecting repeatedly into one place causes lumps, bruising and patchy absorption. Many people alternate left and right thigh, or thigh one week and abdomen the next.

No. This is a common mix-up with Ozempic, whose multi-dose pen holds four or more doses, and with the new Zepbound KwikPen. Each Wegovy pen contains a single dose, and the box of four pens is a month's supply. Once the yellow bar has moved, the pen is empty and locked. Trying to reuse it delivers nothing.

The full ladder from 0.25 mg to 2.4 mg, and what to do at each step, is in the Wegovy dosing schedule.

Our guide to how long Wegovy can be out of the fridge covers edge cases such as power cuts and long trips.

A small red bump, mild bruising or a brief sting at the site are common and fade within a day or two; rotating sites and letting the pen warm up reduce them. The drug's own side effects, nausea, burping, constipation and tiredness, come from how semaglutide works rather than from the injection technique; see what Wegovy does in your body and does Wegovy make you tired. Call a doctor for spreading redness, warmth or pus at the site, a rash or hives, or swelling of the face or throat.

If injections are the problem, the oral option is covered in Wegovy pill vs injection.

The Wegovy pen is designed to be hard to get wrong: one dose, hidden needle, no priming, two clicks and a yellow bar. The rules that matter are to press firmly and hold until the bar stops, to rotate sites, to keep pens cold or under 28 days at room temperature, and never to reuse or double up. If a pen misbehaves, keep it and call Novo Nordisk rather than injecting another. For what to expect once the drug is in, see how long Wegovy takes to work.

This article summarizes the manufacturer's instructions for general information. Follow the instructions for use supplied with your pen and ask your pharmacist to demonstrate the first injection.