Home › Imprint N4Pills with imprint N4
The imprint N4 is used by 2 distinct products in our FDA label database, covering 2 different medicine(s). An imprint alone does not always identify a pill — makers reuse short codes — so always compare the colour, shape and size as well.
Imprint Medicine & strength Colour Shape Size Labeler N4 Perphenazine 16 mg White Round 12 mm Remedyrepack Inc. N 4 Nitroglycerin 0.4 mg White Round 4 mm
Safety first — read this before relying on any result
This page is reference information only . It is not medical advice and does not replace a pharmacist or prescriber.
A result means this pill matches the FDA label for the medicine named — it is never proof of what a loose pill actually is. Counterfeit pills copy real imprints.
Never take a pill you cannot identify with certainty. Confirm the identification with a pharmacist first.If someone may have swallowed an unknown pill, call Poison Control (US) on 1-800-222-1222 immediately.
Source: FDA label data via DailyMed/openFDA, export of October 29, 2026.