What side effects can meropenem cause?
Meropenem (an antibiotic in the carbapenem class) can cause side effects in some people. Commonly reported effects include stomach and nervous system complaints, plus possible changes in lab results. [1]
Typical side effects include:
- Nausea and/or vomiting [1]
- Diarrhea [1]
- Headache or dizziness [1]
Less common but important possible effects include:
- Rash or itching (allergic-type reactions) [1]
- Changes in blood counts or liver enzymes on lab tests [1]
- Signs of a severe allergic reaction (such as trouble breathing, facial/lip swelling, widespread hives) [1]
What are serious meropenem side effects to watch for?
Some reactions can be severe and need urgent medical attention. Report immediately if you develop:
- Severe allergic reaction symptoms (difficulty breathing, swelling of face/lips/tongue, severe rash) [1]
- Severe or persistent diarrhea, especially if it’s watery or bloody (could suggest a serious intestinal problem) [1]
- Seizures or unusual neurologic symptoms (rare, but possible with some antibiotics, especially in high doses or kidney impairment) [1]
Who is more likely to get side effects?
Risk can be higher with:
- Kidney problems (meropenem dosing often needs adjustment; too much drug exposure can raise the chance of neurologic side effects) [1]
- Prior history of serious allergy to antibiotics (including beta-lactams) [1]
- Longer courses or higher doses (can increase the chance of gastrointestinal issues) [1]
Do meropenem side effects differ for injection vs. IV use?
Meropenem is commonly given by injection or IV. The side effects listed above apply to systemic use in general. Injection/IV administration can also cause local effects at the infusion site (like irritation), though the main risks are still medication-related (allergy, diarrhea, lab changes, and rare neurologic effects). [1]
When should you contact a doctor urgently?
Seek urgent help if you have:
- Breathing trouble, swelling of the face/lips/tongue, or a widespread hives-like rash [1]
- Severe diarrhea, blood in stool, or signs of dehydration [1]
- New confusion, severe drowsiness, or seizure-like activity [1]
Sources
[1] Drugs.com (Meropenem side effects and warnings): https://www.drugs.com/sfx/meropenem-side-effects.html