Penicillin V potassium


What is Penicillin V potassium?

Common Brand(s): Pen-Vee K, V-Cillin K, Veetids

Penicillin is an antibiotic used to treat and prevent a wide variety of bacterial infections. It works by stopping the growth of bacteria.

This antibiotic treats and prevents only bacterial infections. It will not work for virus infections (such as the common cold, flu). Using any antibiotic when it is not needed can cause it to not work for future infections.


  • post-exposure anthrax prevention
  • pharyngitis due to Streptococcus pyogenes
  • tonsillitis due to Streptococcus pyogenes
  • scarlet fever
  • erysipelas
  • actinomycosis
  • Lyme disease
  • fusospirochetal pharyngitis
  • pneumococcal infection prevention in sickle cell disease
  • infection prevention from tooth extraction
  • Streptococcus acute otitis media
  • pneumococcal acute otitis media
  • acute bacterial otitis media
  • rheumatic fever prevention
  • pharyngitis
  • upper respiratory pneumococcal infection
  • upper respiratory streptococcal infection
  • gingivostomatitis
  • skin and skin structure infection
  • Staphylococcus aureus skin and skin structure infection
  • cutaneous anthrax

Usage Instructions

Take this medication by mouth as directed by your doctor. This medication may be taken with or without food. However, penicillin is best absorbed when taken on an empty stomach (1 hour before or 2 hours after meals).

The dosage is based on your medical condition and response to treatment.

For the best effect, take this antibiotic at evenly spaced times. To help you remember, take this medication at the same time(s) every day.

Continue to take this medication until the full prescribed amount is finished, even if symptoms disappear after a few days. Stopping the medication too early may allow bacteria to continue to grow, which may result in a return of the infection.

Tell your doctor if your condition persists or worsens.


Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.