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The pill imprinted “S504”

The imprint S504 appears on 2 different products in the FDA data: Acetaminophen, Diphenhydramine Hydrochloride, and Phenylephrine Hydrochloride 325 mg / 12.5 mg / 5 mg, Allergy plus Sinus Headache 325 mg / 12.5 mg / 5 mg. Match the colour and shape below to your pill.

By the pharmaranks editorial teamReviewed against the U.S. FDA / DailyMed (Structured Product Labeling) sourcesHow we research
  • Acetaminophen, Diphenhydramine Hydrochloride, and Phenylephrine Hydrochloride325 mg / 12.5 mg / 5 mg
    Imprint S504 · Green · Capsule · 19 mm · Tablet, film coated
    NDC 83586-004
    Imprint match
    Not in our rated catalog yetDailyMed label ↗
  • Allergy plus Sinus Headache325 mg / 12.5 mg / 5 mg
    Imprint S504 · Green · Capsule · 19 mm · Tablet, coated
    Generic: Acetaminophen, Diphenhydramine HCl, Phenylephrine HCl
    NDC 68210-4190
    Imprint match
    Not in our rated catalog yetDailyMed label ↗

    • 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.