A small amount of liquid leaking from your Wegovy injection site is normal and won’t reduce the effectiveness of your dose. You do not need to re-inject or administer additional medication. Most of the drug was delivered under the skin as intended, and the tiny amount that seeped back out is not enough to matter clinically.
That said, seeing liquid on your skin after injecting an expensive medication is understandably stressful. Here’s how to figure out what happened, whether your dose actually went through, and how to prevent it next time.
Why a Small Drop Leaks Out
Wegovy is injected just beneath the skin into the layer of fat in your abdomen, thigh, or upper arm. When you withdraw the needle, a tiny amount of liquid can follow the needle track back to the surface. This is called backflow, and it happens with nearly all subcutaneous injections, not just Wegovy. The volume is typically less than a drop, which looks more dramatic on your skin than it actually is in terms of lost medication.
The key distinction is between a small wet spot and a visible stream or pool of liquid. A drop or two at the injection site is routine. If you saw liquid spraying or dripping significantly before or during the injection, that could indicate the pen malfunctioned or the needle wasn’t fully inserted into the skin.
How to Confirm Your Dose Was Delivered
The Wegovy pen has a built-in indicator to show whether the full dose went through. When you press the injection button, a yellow bar in the pen window begins to move. The injection is complete when that yellow bar stops moving. After it stops, you need to keep the needle in your skin for a full 10 seconds before removing it. You’ll also hear two clicks during the process, which signal that the dose has been released.
If the yellow bar moved all the way and you heard the clicks, your dose was delivered successfully, even if you noticed a drop of liquid afterward. The yellow bar won’t completely fill the entire window, so don’t mistake a small gap for an incomplete dose.
If the yellow bar didn’t move at all, or stopped partway through, the pen may have malfunctioned. In that case, contact Novo Nordisk’s Patient Customer Care Center at 1-833-934-6891 or call your pharmacy if you’re concerned you didn’t receive the full dose.
Do Not Inject a Second Dose
It can be tempting to use another pen to “make up” for what leaked, but this is the one thing you should avoid doing. Wegovy contains semaglutide, which stays active in your body for roughly a week. Doubling up, even partially, raises the risk of overdose symptoms including severe nausea, vomiting, abdominal pain, dehydration, and dangerously low blood sugar. In serious cases, semaglutide overdoses have caused acute pancreatitis and gallstones.
Because the drug lingers in your system for days, these symptoms can be prolonged and difficult to manage. The small amount of medication lost to leakage is far less risky than the potential consequences of an extra dose.
How to Prevent Leakage Next Time
Most injection site leakage comes down to technique, and a few small adjustments can make a big difference.
- Hold the needle in place for 10 full seconds. The manufacturer specifically instructs you not to remove the pen until the yellow bar has stopped moving and 10 seconds have passed. Pulling out too early is the most common cause of leakage. Count slowly or use a timer on your phone.
- Don’t press too hard or at an angle. The pen should go straight into a pinch of skin. Inserting at an angle can create a wider needle track that lets liquid escape more easily.
- Choose a site with enough fat tissue. The abdomen (at least two inches from the navel), front of the thighs, and back of the upper arms are all approved sites. Areas with more subcutaneous fat absorb the medication more effectively and tend to have less backflow.
- Rotate your injection site. Using the same spot repeatedly can cause the tissue to harden over time, which makes it harder for the medication to absorb properly.
- Don’t rub the area afterward. Gently pressing a cotton ball or tissue over the site for a few seconds is fine, but rubbing can push liquid back through the needle puncture.
The entire injection should take about 5 to 10 seconds from the moment you press the button. If you’re rushing through it in two or three seconds, you’re likely not giving the pen enough time to deliver the full dose before you withdraw.
What If Your Pen Seemed Defective
Occasionally the issue isn’t technique but the pen itself. If the liquid inside appeared cloudy or discolored instead of clear and colorless, the medication may have been compromised and should not have been used. If the pen button jammed, the yellow bar didn’t move, or something felt mechanically off during the injection, contact Novo Nordisk at 1-833-934-6891 to report the issue and ask about a replacement. You can also reach out to your pharmacy directly.
Keep the pen rather than throwing it away, since the manufacturer or pharmacy may ask to inspect it.
Will One Partial Dose Set You Back?
Even in the unlikely event that a meaningful amount of medication leaked out, one slightly reduced dose will not derail your progress. Semaglutide builds up in your body over weeks, and your next scheduled injection will continue that process. Missing a partial dose is comparable to a minor dip in your steady drug levels, which your body adjusts to without issue. If you miss doses entirely for two or more consecutive weeks, that’s when you should talk to your prescriber about whether to restart at a lower dose rather than jumping back to your current one.