Pills with imprint S 1

The imprint S 1 is used by 3 distinct products in our FDA label database, covering 3 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
S 1	Enalapril Maleate 2.5 mg	White	Oval	9 mm	Remedyrepack Inc.
S1	Sertraline Hydrochloride 25 mg	Green	Round	6 mm
S 1	Sirolimus 1 mg	White	Round	6 mm

Source: FDA label data via DailyMed/openFDA, export of October 29, 2026.