Pill identification — FDA label match
LU C31 Pill — Ethambutol Hydrochloride 100 mg (White, Round)
A white round tablet with the imprint LU C31 matches the FDA label for Ethambutol Hydrochloride 100 mg. Compare every detail below with your pill, and confirm with a pharmacist before relying on it.
| Imprint | LU C31 |
|---|---|
| Imprint parts | LU · C31 (the code is split across the pill — often one part per side) |
| Generic name | Ethambutol Hydrochloride |
| Active ingredient(s) | Ethambutol Hydrochloride 100 mg |
| Strength | 100 mg |
| Dosage form | Tablet |
| Colour | White |
| Shape | Round |
| Size | 8 mm |
| Score | No score |
| Labeler | Remedyrepack Inc. |
| NDC examples | 70518-3662-0, 70518-3662-1, 70518-3662-2 |
What this medicine is
According to its FDA-approved label, Ethambutol Hydrochloride is described as follows (reference information only — not advice about whether it is right for anyone):
Ethambutol hydrochloride is indicated for the treatment of pulmonary tuberculosis. It should not be used as the sole antituberculous drug, but should be used in conjunction with at least one other antituberculous drug. Selection of the companion drug should be based on clinical experience,...
Frequently asked questions
What pill has the imprint LU C31?
A white round tablet with the imprint LU C31 matches the FDA label for Ethambutol Hydrochloride 100 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 LU C31 pill look like?
On its FDA label it is described as a white round tablet, 8 mm, with a score recorded as: no score.
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 LU C31 · Ethambutol Hydrochloride — all forms & strengths · White pills · Round pills
Source: FDA label data via DailyMed/openFDA · Label set ID e0d4a594-d3e0-47b0-9f11-f4dbd4552d5a · Record extracted from the openFDA bulk export of October 29, 2026. Spotted an error? Report it — include the imprint and what looks wrong.