How long is Penicillin VK liquid good after mixing?
Penicillin VK (penicillin V potassium)
Keep it in the fridge and throw out what is left 14 days after mixing.
- After mixing
- 14 days
- Fridge
- Yes, keep it refrigerated
Good to know
- Shake well before each dose and keep the bottle tightly closed.
- Generic makers can word this differently. Check the label on the bottle you dispense.
Source: the FDA label on DailyMed, last checked October 14, 2026. Labels change, so check the product in hand. Questions about a patient's medicine go to the pharmacist.
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