What does cap mean on a prescription?
Cap means capsule — a gelatine or plant-based shell containing powder or liquid, swallowed whole.
- Means:
- capsule
- From:
- capsula
- Type:
- What form
- Also written:
- cap, caps, CAP
What it means in practice
As with tablets, the number of capsules only makes sense next to the strength. Capsules generally should not be opened, because the shell often controls where and how fast the contents release.
Example on a prescription
1 cap PO BID
Take one capsule by mouth twice a day.
Commonly confused with
- TABTab is a tablet. Many tablets can be split; capsules usually cannot.
Worth knowing
Ask before opening a capsule or sprinkling its contents on food. For modified-release products this can release the full dose at once.
Frequently asked questions
What does 1 cap PO BID mean?
Take one capsule by mouth twice a day.
Can I open a capsule if I cannot swallow it?
Not without checking. Some capsules can be opened, but modified-release ones must not be. Your pharmacist can advise or suggest a liquid alternative.
Related abbreviations
Have a prescription you cannot read?
Upload a photo of the label and Symplicured will read the abbreviations, dosage and timing back to you in plain language.
This page explains prescription notation for general information. It is not medical advice and does not replace your prescriber or pharmacist. If a label is unclear or differs from what you were told, check with your pharmacy before taking the medicine.