Prescription requiredAntibiotic

MEGAPEN 250MG INJ VIAL — Side Effects & Warnings

Known side effects of MEGAPEN 250MG INJ VIAL include Injection site pain, rash, urticaria, diarrhea, nausea, vomiting, abdominal discomfort, elevated liver enzymes, candidiasis, fever. Not everyone experiences these side effects.

Common Side Effects

Injection site pain
rash
urticaria
diarrhea
nausea
vomiting
abdominal discomfort
elevated liver enzymes
candidiasis
fever

This is not an exhaustive list. Consult your doctor if you notice any unusual symptoms.

Important Warnings

Prescription-only antibiotic. Do not use in patients with known hypersensitivity to penicillins; use caution in patients with history of allergy/asthma (risk of anaphylaxis). Use with caution in infectious mononucleosis (high risk of rash). Monitor for severe diarrhea/colitis (C. difficile) and discontinue if suspected. Dose adjustment may be needed in renal impairment. Prolonged use may cause superinfection; monitor blood counts with long courses.

Drug Interactions

MEGAPEN 250MG INJ VIAL may interact with the following:

Allopurinol (increased risk of rash)
probenecid (increases ampicillin levels)
methotrexate (reduced clearance/toxicity risk)
oral anticoagulants such as warfarin (may increase INR)
oral contraceptives (possible reduced efficacy—advise backup)
bacteriostatic antibiotics like tetracyclines/chloramphenicol (may reduce efficacy)

Always tell your doctor about all medicines you are taking, including over-the-counter drugs and supplements.

Pregnancy Safety

Generally safe (use on doctor’s advice)

Alcohol Interaction

Use with caution

Habit Forming

Storage

Store as per label, typically below 25°C, protected from light and moisture. Keep vial in outer carton. After reconstitution, use promptly; discard unused portion as per local guidelines.

MEGAPEN 250MG INJ VIAL — Safety Summary

Composition: Ampicillin 250 mg (as ampicillin sodium) injection, vial
Prescription: Required (Rx)
Pregnancy: Generally safe (use on doctor’s advice)
Alcohol: Use with caution
Habit forming: No

MEGAPEN 250MG INJ VIAL — Safety FAQs

What should I do if I experience side effects?

Mild side effects often resolve on their own. If side effects are severe or persistent, stop the medicine and consult your doctor immediately.

Are all listed side effects common?

No. Some side effects are common while others are rare. Not everyone experiences side effects. Consult your doctor if you are concerned.

Can I take this medicine with other drugs?

Some medicines interact with each other. Always inform your doctor about all medicines you are currently taking.

When should I seek emergency help?

Seek immediate medical attention if you experience severe allergic reactions (difficulty breathing, swelling of face/throat), chest pain, or any life-threatening symptoms.

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Safety disclaimer

This information is for educational purposes only and is not a substitute for professional medical advice. If you experience severe side effects, seek medical attention immediately.