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Penicillin VK - Overview

Penicillin (oral), marketed as penicillin-VK, is an antibiotic medication used to treat infections that are thought to be susceptible to the medication. Push Health can connect people who think they need a penicillin prescription with licensed medical providers who can prescribe the medication when appropriate to do so.

How Does Penicillin Work?

Penicillin is a type of antibiotic medication that is used to treat certain bacterial infections, most often strep throat caused by susceptible group A streptococcus. Penicillin works by interfering with building of cell walls in susceptible bacteria.

Penicillin is structurally similar to a number of other antibacterial medications such as amoxicillin, ampicillin and dicloxacillin. For many types of infections, the use of penicillin has been replaced by cephalosporins such as cefaclor (Ceclor), cefdinir (Omnicef), cefixime (Suprax), cefpodoxime (Vantin), cefuroxime (Ceftin), and cephalexin (Keflex) due to resistance.

Penicillin - Dosage and Cost

Penicillin V is frequently administered as penicillin 250 mg or penicillin 500 mg every 6 to 8 hours. Penicillin V is similar to penicillin G as it is the phenoxymethyl analog of it. Penicillin - VK, also known as penicillin V potassium tablets, are made for oral administration as 250 mg or 500 mg tablets. The potassium salt added to penicillin V makes it more resistant to deactivation by acid in the stomach.

Penicillin VK is considered very affordable at under 30 cents per tablet at many pharmacies. Insurance plans and prescription discount cards may also help with medication costs.

Can I Buy Penicillin Online?

Penicillin is a prescription medication. People who might need of a penicillin prescription can connect with a licensed medical provider through Push Health who can prescribe the medication to a local or delivery pharmacy when appropriate to do so.

Penicillin - Side Effects

Penicillin can cause side effects such as nausea, vomiting, stomach pain and diarrhea. People who have an allergy to the medication or related drugs should not use it. Discuss any planned alcohol use with your medical provider. Penicillin should not be used to treat viral infections. Concerns and questions should be discussed with one's medical provider.

More Penicillin Information

Last updated October 14, 2026. Given the evolving nature of medicine and science, this information might not be accurate and should not be construed as medical advice or diagnosis / treatment recommendations. Please consult a licensed medical provider if you have additional questions. Please call 911 immediately or go to the nearest emergency room if you believe you are experiencing a medical emergency.