Pill identification — FDA label match
C81 Pill — Probenecid and Colchicine 0.5 mg / 500 mg (White, Capsule)
A white capsule tablet with the imprint C81 matches the FDA label for Probenecid and Colchicine 0.5 mg / 500 mg. Compare every detail below with your pill, and confirm with a pharmacist before relying on it.
| Imprint | C81 |
|---|---|
| Generic name | Probenecid and Colchicine |
| Active ingredient(s) | Probenecid 500 mg; Colchicine 0.5 mg |
| Strength | 0.5 mg / 500 mg |
| Dosage form | Tablet |
| Colour | White |
| Shape | Capsule |
| Size | 18 mm |
| Score | Two even pieces |
| Labeler | Remedyrepack Inc. |
| NDC examples | 70518-4644-0, 70518-4644-1 |
What this medicine is
According to its FDA-approved label, Probenecid and Colchicine is described as follows (reference information only — not advice about whether it is right for anyone):
For the treatment of chronic gouty arthritis when complicated by frequent, recurrent acute attacks of gout.
Frequently asked questions
What pill has the imprint C81?
A white capsule tablet with the imprint C81 matches the FDA label for Probenecid and Colchicine 0.5 mg / 500 mg. Always compare the colour, shape and size as well — short imprints are shared by different medicines — and confirm with a pharmacist.
What does the C81 pill look like?
On its FDA label it is described as a white capsule tablet, 18 mm, with a score recorded as: two even pieces.
How can I be sure this identification is right?
Check every characteristic — imprint (both sides), colour, shape, size and score — against the pill in your hand. If all of them agree, the pill matches the FDA label shown here, but that is still not a guarantee: counterfeit pills copy real imprints. A pharmacist can confirm the identification in person, and you should never take a pill you are not certain about.
Browse: all pills with imprint C81 · Probenecid and Colchicine — all forms & strengths · White pills · Capsule pills
Source: FDA label data via DailyMed/openFDA · Label set ID 573e61e5-f5e1-4119-9d8e-d9a961a1baa9 · Record extracted from the openFDA bulk export of October 29, 2026. Spotted an error? Report it — include the imprint and what looks wrong.