Pen V is a prescription medication that is used to treat several different types of bacterial infections including ear infections. Pen V contains the antibiotic penicillin and works by fighting forms of bacteria in the body.

Make sure to always read the patient information and instructions before using this medication. Always follow your doctor’s directions.

• Pen V can be taken with or without food.
• Take this medication for the full amount of time that it is prescribed, even when your symptoms improve.
• You may need your blood, kidney or liver function checked regularly while taking this medication.

Tell your doctor and pharmacist:

• About your drug and other allergies.
• If you take any other prescription or over-the-counter medications.
• Your medical history particularly of kidney disease, bleeding disorders, blood clotting disorders, asthma, or diarrhea caused by antibiotics.
• If you are pregnant or planning pregnancy.
• If you are breast-feeding.

You should also know:

• This medication can affect certain medical tests. Tell all doctors that treat you that you take this medication.
• Pen V can lessen the effectiveness of some birth control pills.
• Diarrhea may be a sign of a new infection. Speak to your doctor before taking any anti-diarrhea medication.

Common side effects of Pen V include but are not limited to:

• Headaches.
• Nausea or vomiting.
• Stomach pain.
• Vaginal itching or discharge.
• Signs of thrush, such as white patches inside the mouth or throat.
• A swollen, black, or ‘hairy’ tongue.

Get medical help if you have any of the following side effects of penicillin:

• Bloody or watery diarrhea.
• Easy bruising or bleeding.
• Less frequent or no urination.
• Unusual weakness.
• Feeling confused, agitated, or having unusual thoughts or behaviors.
• Flu symptoms including fever, chills, or body aches.
• Seizures.
• Severe skin rash, peeling, or itching.
• Symptoms of an allergic reaction such as difficulty breathing, hives, or swelling in your face, lips, or throat.

What should I do if I miss a dose of Pen V?

If you miss a dose of Pen V, you should take it as soon as you remember. However, if it is almost time for your next dose, then skip your missed dose.

What is the strength of Pen V?

Pen V is available in a strength of 300mg.