Pill identification — FDA label match

312 B Pill — Doxycycline Hyclate 100 mg (Brown, Round)

A brown round tablet with the imprint 312 B matches the FDA label for Doxycycline Hyclate 100 mg. Compare every detail below with your pill, and confirm with a pharmacist before relying on it.

Imprint312 B
Imprint parts312 · B (the code is split across the pill — often one part per side)
Generic nameDoxycycline Hyclate
Active ingredient(s)Doxycycline Hyclate 100 mg
Strength100 mg
Dosage formTablet, Film Coated
ColourBrown
ShapeRound
Size9 mm
ScoreNo score
LabelerRemedyrepack Inc.
NDC examples70518-3214-0, 70518-3214-1, 70518-3214-2, 70518-3214-3, 70518-3214-4 … (6 package codes in total)

What this medicine is

According to its FDA-approved label, Doxycycline Hyclate is described as follows (reference information only — not advice about whether it is right for anyone):

To reduce the development of drug-resistant bacteria and maintain effectiveness of doxycycline hyclate and other antibacterial drugs, doxycycline hyclate should be used only to treat or prevent infections that are proven or strongly suspected to be caused by susceptible bacteria. When culture and...

Equivalent pills — same medicine, different imprint

The pills below contain the same active ingredient at the same strength (Doxycycline Hyclate 100 mg). Different makers stamp their own codes, so equivalent pills often look completely different. This is factual label information — it is not a suggestion to substitute one product for another; only a pharmacist or prescriber can advise on that.

WEST WARD 3142 Doxycycline Hyclate 100 mg — Blue · capsule · 21 mmCY 185 Doxycycline Hyclate 100 mg — Yellow · round · 9 mm186 CY Doxycycline Hyclate 100 mg — Blue · capsule · 22 mmMP 37 Doxycycline Hyclate 100 mg — Orange · round · 9 mmWW 112 Doxycycline Hyclate 100 mg — Orange · round · 17 mmMUTUAL 105 Doxycycline Hyclate 100 mg — Blue · capsule · 22 mm501 Doxycycline Hyclate 100 mg — Orange · round · 9 mmCHL D76 Doxycycline Hyclate 100 mg — Blue · capsule · 20 mm312 E Doxycycline Hyclate 100 mg — Brown · round · 9 mm
2985 Doxycycline Hyclate 100 mg — Blue · capsule · 21 mmFull page in a later wave
AMNEAL 1100 Doxycycline Hyclate 100 mg — Blue · capsule · 22 mmFull page in a later wave
3626 Doxycycline Hyclate 100 mg — Orange · round · 9 mmFull page in a later wave
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Frequently asked questions

What pill has the imprint 312 B?

A brown round tablet with the imprint 312 B matches the FDA label for Doxycycline Hyclate 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 312 B pill look like?

On its FDA label it is described as a brown round tablet, 9 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 312 B · Doxycycline Hyclate — all forms & strengths · Brown pills · Round pills

Source: FDA label data via DailyMed/openFDA · Label set ID 2305ab4a-7d08-41f6-9c39-c9b6835be389 · Record extracted from the openFDA bulk export of October 29, 2026. Spotted an error? Report it — include the imprint and what looks wrong.