Pill identification — FDA label match
LS 412 Pill — Nitrofurantion Macrocrystals 100 mg (Blue, Capsule)
A blue capsule with the imprint LS 412 matches the FDA label for Nitrofurantion Macrocrystals 100 mg. Compare every detail below with your pill, and confirm with a pharmacist before relying on it.
| Imprint | LS 412 |
|---|---|
| Imprint parts | LS · 412 (the code is split across the pill — often one part per side) |
| Brand name | Nitrofurantoin Macrocrystals |
| Generic name | Nitrofurantion Macrocrystals |
| Active ingredient(s) | Nitrofurantoin 100 mg |
| Strength | 100 mg |
| Dosage form | Capsule |
| Colour | Blue |
| Shape | Capsule |
| Size | 18 mm |
| Score | No score |
| Labeler | Remedyrepack Inc. |
| NDC examples | 70518-3827-0, 70518-3827-1, 70518-3827-2 |
What this medicine is
According to its FDA-approved label, Nitrofurantion Macrocrystals is described as follows (reference information only — not advice about whether it is right for anyone):
Nitrofurantoin capsules (macrocrystals) are specifically indicated for the treatment of urinary tract infections when due to susceptible strains of Escherichia coli , enterococci, Staphylococcus aureus , and certain susceptible strains of Klebsiella and Enterobacter species. Nitrofurantoin is not...
Equivalent pills — same medicine, different imprint
The pills below contain the same active ingredient at the same strength (Nitrofurantion Macrocrystals 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.
Frequently asked questions
What pill has the imprint LS 412?
A blue capsule with the imprint LS 412 matches the FDA label for Nitrofurantion Macrocrystals 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 LS 412 pill look like?
On its FDA label it is described as a blue capsule, 18 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 LS 412 · Nitrofurantion Macrocrystals — all forms & strengths · Blue pills · Capsule pills
Source: FDA label data via DailyMed/openFDA · Label set ID 27f2ed1a-d4c2-4c12-92a6-3d0e9ce7f6a1 · Record extracted from the openFDA bulk export of October 29, 2026. Spotted an error? Report it — include the imprint and what looks wrong.