February 27, 2017
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Penicillin VK

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Penicillin VK

(penicillin V potassium) Tablets, USP
250 mg (400,000 Units),
500 mg (800,000 Units)

To reduce the development of drug-resistant bacteria and maintain the effectiveness of penicillin-VK and other antibacterial drugs, penicillin-VK should be used only to treat or prevent infections that are proven or strongly suspected to be caused by bacteria.


Penicillin V is the phenoxymethyl analog of penicillin G.

Penicillin V potassium is the potassium salt of penicillin V.

Penicillin VK (Potassium) - Structural Formula Illustration

Molecular Formula: C16H17O5KN2S      Molecular Weight: 388.5

Penicillin -VK (Penicillin V Potassium Tablets USP), for oral administration, contain 250 mg (400,000 units) or 500 mg (800,000 units) penicillin V. In addition, each tablet contains the following inactive ingredients: hydroxypropyl methylcellulose, magnesium stearate, polyethylene glycol, povidone, talc, and titanium dioxide.

Last reviewed on RxList: 9/8/2016
This monograph has been modified to include the generic and brand name in many instances.

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