The imprint 4I appears on 3 different products in the FDA data: IBU 400 mg, IBUPROFEN 400 mg, Ibuprofen 400 mg. Match the colour and shape below to your pill.
By the pharmaranks editorial team·Reviewed against the U.S. FDA / DailyMed (Structured Product Labeling) sources·How we research
A pill’s appearance varies between manufacturers and generic versions, imprints wear off, and two different drugs can share an imprint. Everything here is transcribed straight from the FDA’s DailyMed labels — we do not alter or infer it — but treat any identification as a starting point and confirm with a licensed pharmacist before taking or discarding a medication.
Source: the U.S. National Library of Medicine’s DailyMed Structured Product Labeling — the FDA-required drug labels. Imprint, colour, shape, size and score are transcribed, not inferred. This is reference information, not medical advice.