Megapen 500 Cap.

MEGAPEN 500 CAP.

Name

• Brand Name: MEGAPEN 500 CAP.
• Common Name: Ampicillin and Cloxacillin Capsules

Composition

MEGAPEN 500 CAP. contains a combination of two penicillin antibiotics:

• Ampicillin 250mg
• Cloxacillin 250mg

Together, these form a 500mg capsule.

Uses

MEGAPEN 500 CAP. is a broad-spectrum antibiotic used to treat a wide range of bacterial infections. It works by preventing the formation of the bacterial protective covering, which is essential for their survival. It is prescribed for:

• Respiratory tract infections: Such as bronchopneumonia, acute exacerbations of chronic bronchitis, pneumonia, and sinusitis.
• Post-operative infections: Including wound infections and pulmonary infections after surgery.
• Other infections:
  • Septicaemia
  • Pelvic infections
  • Urinary tract infections (UTIs)
  • Skin and soft tissue infections (e.g., cellulitis, abscesses, impetigo)
  • Gastrointestinal infections (e.g., gastroenteritis, enteric fever)
  • Bone and joint infections (e.g., osteomyelitis, septic arthritis)
  • Ear, nose, and throat (ENT) infections
  • Puerperal fever

Dosage and Administration

The typical adult dose for MEGAPEN 500 CAP. is 500 mg (one capsule) to 1g (two capsules) every 6 hours. In severe infections, the dosage may be increased.

• Swallow the capsule whole with a glass of water; do not crush or chew it.
• For best results, it is often recommended to administer the medicine half to one hour prior to meals or at least two hours after meals to ensure maximal absorption. It can also be taken with or without food, but should be taken at a fixed time for better efficacy.
• Complete the full prescribed course of treatment, even if symptoms improve, to prevent treatment failure and recurrence of infection.

Side Effects

Like all medicines, MEGAPEN 500 CAP. can cause side effects, though not everyone experiences them.

• Common Side Effects:
  • Nausea
  • Vomiting
  • Diarrhea
  • Stomach pain or upset
  • Skin rash, urticaria, pruritus (itching)
• Serious Side Effects (Seek immediate medical attention if experienced):
  • Allergic reactions such as hives, difficulty breathing, swelling of the face, lips, tongue, or throat.
  • Severe skin reactions including fever, sore throat, burning eyes, skin pain, or a red or purple skin rash with blistering and peeling.
  • Watery diarrhea or severe stomach pain.

Precautions

• Allergies: Do not take MEGAPEN 500 CAP. if you are allergic to Ampicillin, Cloxacillin, or any other penicillin or beta-lactam antibiotics (e.g., cephalosporins).
• Pre-existing Conditions: Inform your doctor if you have liver or kidney problems, a history of allergic reactions to antibiotics, glandular fever, leukemia, malnourishment, low immunity, diabetes, HIV infection, convulsions, or a blood-related disorder.
• Pregnancy and Breastfeeding: The effect of Megapen capsule in pregnant women is not well established; use only if prescribed and considered essential by a doctor. It is generally not recommended for use in breastfeeding women as it may pass into breast milk and cause side effects in the infant.
• Drug Interactions:
  • May interact with medicines that inhibit bacterial growth (e.g., chloramphenicol, erythromycin, tetracyclines, sulfonamides).
  • Medicines for gout (probenecid, allopurinol) may require dosage adjustments or increase the risk of allergic skin reactions.
  • Can decrease the effect of oral contraceptives; extra contraceptive precautions may be needed.
  • Acetylsalicylic acid (aspirin) and sulfasalazine may interact.
• General Warnings:
  • MEGAPEN 500 CAP. treats bacterial infections only and is not effective against viral infections like the common cold or flu.
  • Not recommended for neonates with jaundice.
  • Prolonged use may increase the risk of fungal infections.
  • Can affect the results of certain medical tests (e.g., urine or blood tests).
  • Avoid alcohol while taking this medicine as it can cause drowsiness.
  • May cause blurred vision and drowsiness, so caution is advised when driving or operating machinery.

Storage

• Store in a cool, dry place.
• Protect from light.
• Keep out of reach of children.
• Do not use after the expiry date.

MEGAPEN 500 CAP. is a combination antibiotic medication containing Ampicillin and Cloxacillin. It belongs to the penicillin class of antibiotics and is used to treat various bacterial infections.

Here are some frequently asked questions about MEGAPEN 500 CAP.:

What is MEGAPEN 500 CAP. used for?

MEGAPEN 500 CAP. is used to treat a range of bacterial infections, including those affecting the respiratory tract (like bronchopneumonia, bronchitis, and sinusitis), skin and soft tissues (such as cellulitis and abscesses), bones (e.g., osteomyelitis), urinary tract, gastrointestinal tract, ear, nose, and throat. It is also used for post-operative wound and pulmonary infections. It is important to note that it is not effective against viral infections such as the common cold or flu.

How does MEGAPEN 500 CAP. work?

MEGAPEN 500 CAP. works by inhibiting the synthesis of bacterial cell walls. Ampicillin interferes with the formation of peptidoglycan, a crucial component of the bacterial cell wall, while Cloxacillin binds to penicillin-binding proteins, disrupting cell wall synthesis. This dual action prevents bacteria from reproducing and ultimately leads to their death, helping the body fight the infection effectively.

What is the usual dosage of MEGAPEN 500 CAP.?

For adults and children over 10 years, the usual dose of MEGAPEN 500 CAP. is one 500 mg capsule three times a day, or 500 mg to 1 gram (1-2 capsules) every 6 hours. In severe infections, your doctor may increase the dosage. It should be taken on an empty stomach, approximately 1 hour before a meal, to ensure maximal absorption. Always follow your doctor's specific instructions regarding dosage and duration of treatment.

What are the possible side effects of MEGAPEN 500 CAP.?

Common side effects include nausea, vomiting, diarrhea, stomach pain or upset, and skin rash, urticaria, and pruritus. More serious, though rare, side effects can include allergic reactions (such as hives, difficulty breathing, and swelling of the face, lips, tongue, or throat) or severe skin reactions (fever, sore throat, burning eyes, skin pain, blistering, and peeling). Diarrhea can sometimes be severe and associated with Clostridium difficile-associated diarrhea. If you experience any severe or persistent side effects, contact your doctor immediately.

Is MEGAPEN 500 CAP. safe during pregnancy or breastfeeding?

Safety and efficacy have not been firmly established in pregnant and breastfeeding women. If you are pregnant, think you may be pregnant, or are planning to have a baby, you should consult your doctor for advice before taking this medicine, as it is generally not recommended unless clearly necessary. During breastfeeding, MEGAPEN 500 CAP. passes into breast milk and can cause side effects like diarrhea and fungal infections in the breastfed baby. Therefore, it is generally not recommended for breastfeeding women unless absolutely necessary, and the infant should be closely monitored for any adverse effects.

Can MEGAPEN 500 CAP. be taken with other medications?

MEGAPEN 500 CAP. can interact with several medications. For instance, concomitant use with probenecid and allopurinol (used for gout) can increase the risk of side effects like skin rashes. It may also reduce the effectiveness of oral contraceptives, requiring additional contraceptive precautions. Antibiotics like chloramphenicol, azithromycin, sulphonamides, doxycycline, erythromycin, and tetracycline may interfere with its efficacy. Caution is advised when taken with paracetamol due to the increased risk of high anion gap metabolic acidosis (HAGMA), especially in patients with severe renal impairment, sepsis, or malnutrition. Methotrexate excretion may be reduced, potentially increasing its toxicity. Always inform your doctor about all medicines, supplements, or herbal products you are taking to avoid potential interactions.

What precautions should be taken with MEGAPEN 500 CAP.?

Inform your doctor if you have liver or kidney problems, a history of allergic reactions to penicillin or other antibiotics, glandular fever, leukemia, malnourishment, low immunity, diabetes, HIV infection, or convulsions. It should be used with caution in patients with kidney or liver disease, and dose adjustments or monitoring may be required. Do not take MEGAPEN 500 CAP. if you are allergic to ampicillin, cloxacillin, or other penicillin/cephalosporin antibiotics. Avoid use if infectious mononucleosis is suspected due to the risk of skin rashes. Prolonged use can lead to the overgrowth of non-susceptible organisms and fungal infections.

What happens if a dose of MEGAPEN 500 CAP. is missed?

If you forget to take a dose, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose to make up for a forgotten one, as this may increase the chance of unwanted side effects.

How should MEGAPEN 500 CAP. be stored?

MEGAPEN 500 CAP. should be stored in a cool, dry place below 25°C, protected from light, and kept tightly closed. Keep all medicines out of reach of children. Do not use the medicine after the expiry date.