The pill imprinted “RE21”
A pill printed with RE21 is Atenolol 100 mg, a white, round tablet.
By the pharmaranks editorial teamReviewed against the U.S. FDA / DailyMed (Structured Product Labeling) sourcesHow we research
Atenolol100 mg
Imprint RE;21 · White · Round · 9 mm · Tablet
NDC 10544-171
Atenolol100 mg
Imprint RE;21 · White · Round · 9 mm · Tablet
NDC 33261-517
Atenolol100 mg
Imprint RE;21 · White · Round · 9 mm · Tablet
NDC 54868-1971
Atenolol100 mg
Imprint RE;21 · White · Round · 9 mm · Tablet
NDC 42254-046
Atenolol100 mg
Imprint RE;21 · White · Round · 9 mm · Tablet
NDC 67296-0755
Atenolol100 mg
Imprint RE;21 · White · Round · 9 mm · Tablet
NDC 53808-0345
Atenolol100 mg
Imprint RE;21 · White · Round · 9 mm · Tablet
NDC 83980-024
Before you rely on this
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.
Wrong pill? Search by imprint, colour and shape in the full pill identifier.
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.