Wegovy Pen Problems: Why They Happen, Risks, and What to Do
The Wegovy pen is a popular tool for people using semaglutide to manage their weight. It’s easy to use, comes with pre-measured doses, and is designed for weekly injections. But sometimes, the pen doesn’t work right, which can worry users about safety and wasted medicine. In this article, we’ll explain why Wegovy pens might fail, how to spot problems, what to do if it happens, and how to prevent issues.
What Is the Wegovy Pen?
Wegovy (semaglutide) is a prescription medicine from Novo Nordisk to help adults with obesity or weight-related health problems, like diabetes or high blood pressure, manage their weight. It comes in a single-use injection pen that you use once a week. The pen has different dose levels, starting low and increasing slowly to help your body adjust and avoid side effects like nausea.
Even though the pen is simple to use, problems can happen, which can mess up your treatment and cause stress.
Common Problems with the Wegovy Pen
Sometimes, users report issues with the Wegovy pen. Here are the most common ones:
- No Medicine Comes Out
- The pen doesn’t inject any medicine when you press the button.
- This might be due to a jammed mechanism or a blocked needle.
- Medicine Leaks
- You see medicine leaking from the pen before, during, or after the injection.
- This means you might not get the full dose, which can make the medicine less effective.
- Bent or Broken Needle
- The needle gets damaged or doesn’t go into the skin properly, so the injection fails.
- This can happen from rough handling or a manufacturing issue.
- Hard to Press
- The pen is tough to push or doesn’t “click” when you try to use it, showing something’s stuck inside.
- Accidental Release
- The pen might release medicine before you’re ready if it’s dropped or mishandled.
- Incomplete Dose
- The pen stops injecting before giving the full dose, leaving you with less medicine than needed.
Why Do These Problems Happen?

Wegovy pen issues can come from a few causes:
- Factory Issues: A rare faulty batch of pens might have broken parts.
- Wrong Storage: Storing the pen in very hot, cold, or sunny places can damage it.
- User Mistakes: Not following the instructions, like forgetting to remove the cap or not holding the pen long enough, can cause problems.
- Shipping Damage: Pens can get damaged if they’re dropped or shaken during delivery.
- Expired Pens: Using a pen past its expiration date can make it less reliable.
What to Do If Your Pen Doesn’t Work
If your Wegovy pen fails, follow these steps:
- Don’t Try to Fix It
- The pen is for one-time use. Trying to fix or reuse it can be unsafe.
- Check the Instructions
- Look at the pen’s manual to make sure you followed every step correctly. Sometimes, the issue is a simple mistake.
- Don’t Use Another Pen Right Away
- If you think you didn’t get the full dose, don’t use another pen immediately. Taking too much medicine can cause side effects like nausea or low blood sugar.
- Contact Novo Nordisk or Your Pharmacy
- Call Novo Nordisk customer service to report the problem. They may replace the pen and ask for the pen’s lot number to check for issues.
- Your pharmacy can also help with replacements or report the problem.
- Talk to Your Doctor
- Your doctor can tell you whether to skip the dose or take it later, depending on when the problem happened.
- Report to the FDA (for U.S. Users)
- If you’re in the U.S., you can report the issue to the FDA’s MedWatch program to help track pen problems.
How to Prevent Pen Problems
You can’t control everything, but these tips can lower the chances of issues:
- Store Correctly: Keep the pen in the fridge (36°F–46°F) and away from sunlight. Don’t freeze it.
- Check Before Using: Look for cracks, leaks, or damage before injecting.
- Follow Instructions: Remove the cap properly, press the pen until it clicks, and hold it for the recommended time to get the full dose.
- Handle Gently: Don’t shake or drop the pen to keep its parts working.
- Dispose Safely: Throw used or broken pens into an FDA-approved sharps container.
How Pen Problems Affect Your Health
If your pen doesn’t work, it can mess up your dosing schedule, which might make Wegovy less effective for weight loss or controlling appetite. If you’re managing diabetes, missing a dose could affect your blood sugar.
In rare cases, if the pen gives too much medicine by mistake, you might feel:
- Dizzy
- Nauseous or vomiting
- Very tired
- Low blood sugar
If you have these symptoms, get medical help right away.
What Novo Nordisk Says
Novo Nordisk says pen problems are rare but can happen. They recommend storing the pens correctly and following instructions carefully. Their customer service can replace faulty pens, and they’re working to improve the pens to prevent issues in the future.
Final Thoughts
The Wegovy pen is a helpful tool for weight management, but it’s not perfect. If your pen doesn’t work, stay calm, don’t take extra medicine, and reach out to your doctor and Novo Nordisk for help. By storing and using the pen carefully, you can avoid most problems and keep your treatment on track. Your health is the priority, and there are solutions if something goes wrong.
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