Prescription requiredAntibiotic

Megapen 250MG Inj Vial — Uses, Dosage & Benefits

Megapen 250MG Inj Vial is used for Treatment of susceptible bacterial infections such as respiratory tract infections, urinary tract infections, gastrointestinal infections (including enteric fever/typhoid as per susceptibility), skin and soft tissue infections, and septicemia; also used for perioperative prophylaxis where appropriate..

Medically reviewed by Dr. Balaji Krishnan, MBBS · Updated June 2026

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Active Ingredient / Composition

Ampicillin 250 mg (as ampicillin sodium) injection, vial

What is Megapen 250MG Inj Vial used for?

Treatment of susceptible bacterial infections such as respiratory tract infections
urinary tract infections
gastrointestinal infections (including enteric fever/typhoid as per susceptibility)
skin and soft tissue infections
and septicemia; also used for perioperative prophylaxis where appropriate.

How Megapen 250MG Inj Vial Works

Ampicillin is a beta-lactam penicillin antibiotic. It inhibits bacterial cell wall synthesis by binding to penicillin-binding proteins, leading to cell lysis and death in susceptible bacteria.

Dosage & Directions

Injection to be administered by a healthcare professional only (IV/IM as prescribed). Dose and duration depend on infection type, severity, kidney function and culture sensitivity. Reconstitute/dilute as per label instructions and use immediately after preparation; complete the full prescribed course.

Always follow your doctor's prescription. Do not self-medicate.

Key Benefits

Treats susceptible bacterial infections
Broad-spectrum penicillin coverage
Useful in respiratory and urinary infections
Injectable option for moderate to severe infections

Pregnancy

Generally safe (use on doctor’s advice)

Alcohol Interaction

Use with caution

Megapen 250MG Inj Vial — Quick Facts

Composition: Ampicillin 250 mg (as ampicillin sodium) injection, vial
Therapeutic class: Antibiotic
Drug class: Penicillin (beta-lactam) antibiotic
Prescription: Required (Rx)
Price: ₹9
Habit forming: No
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 — Usage FAQs

How should I take this medicine?

Follow the dosage prescribed by your doctor. Do not alter the dose without medical advice.

Can I take this medicine without a prescription?

Prescription-required medicines need a valid Rx. OTC medicines can be purchased directly.

What if I miss a dose?

Take the missed dose as soon as you remember, unless it is close to your next scheduled dose. Do not double the dose.

How long does it take to show effect?

The time to show effect varies by medicine and condition. Consult your doctor for specific timelines.

Megapen 250MG Inj Vial — Uses, Dosage & Benefits

Active Ingredient / Composition

What is Megapen 250MG Inj Vial used for?

How Megapen 250MG Inj Vial Works

Dosage & Directions

Key Benefits

Pregnancy

Alcohol Interaction

Megapen 250MG Inj Vial — Quick Facts

Megapen 250MG Inj Vial — Usage FAQs

More from PingMeDoc™

Safety disclaimer

Megapen 250MG Inj Vial — Uses, Dosage & Benefits

Active Ingredient / Composition

What is Megapen 250MG Inj Vial used for?

How Megapen 250MG Inj Vial Works

Dosage & Directions

Key Benefits

Pregnancy

Alcohol Interaction

Megapen 250MG Inj Vial — Quick Facts

Megapen 250MG Inj Vial — Usage FAQs

More from PingMeDoc™

Safety disclaimer