Pill identification — FDA label match
42 U Pill — Guanfacine 2 mg (White, Round)
A white round tablet with the imprint 42 U matches the FDA label for Guanfacine 2 mg. Compare every detail below with your pill, and confirm with a pharmacist before relying on it.
| Imprint | 42 U |
|---|---|
| Imprint parts | 42 · U (the code is split across the pill — often one part per side) |
| Generic name | Guanfacine |
| Active ingredient(s) | Guanfacine Hydrochloride 2 mg |
| Strength | 2 mg |
| Dosage form | Tablet, Extended Release |
| Colour | White |
| Shape | Round |
| Size | 12 mm |
| Score | No score |
| Labeler | Remedyrepack Inc. |
| NDC examples | 70518-4675-0 |
What this medicine is
According to its FDA-approved label, Guanfacine is described as follows (reference information only — not advice about whether it is right for anyone):
Guanfacine extended-release tablets are indicated for the treatment of Attention Deficit Hyperactivity Disorder (ADHD) as monotherapy and as adjunctive therapy to stimulant medications [see Clinical Studies ( 14 )]. Guanfacine extended-release tablets are central alpha 2 A-adrenergic receptor...
Equivalent pills — same medicine, different imprint
The pills below contain the same active ingredient at the same strength (Guanfacine 2 mg). Different makers stamp their own codes, so equivalent pills often look completely different. This is factual label information — it is not a suggestion to substitute one product for another; only a pharmacist or prescriber can advise on that.
Frequently asked questions
What pill has the imprint 42 U?
A white round tablet with the imprint 42 U matches the FDA label for Guanfacine 2 mg. Always compare the colour, shape and size as well — short imprints are shared by different medicines — and confirm with a pharmacist.
What does the 42 U pill look like?
On its FDA label it is described as a white round tablet, 12 mm, with a score recorded as: no score.
How can I be sure this identification is right?
Check every characteristic — imprint (both sides), colour, shape, size and score — against the pill in your hand. If all of them agree, the pill matches the FDA label shown here, but that is still not a guarantee: counterfeit pills copy real imprints. A pharmacist can confirm the identification in person, and you should never take a pill you are not certain about.
Browse: all pills with imprint 42 U · Guanfacine — all forms & strengths · White pills · Round pills
Source: FDA label data via DailyMed/openFDA · Label set ID ab2e3597-14fc-4614-ae87-0d1d18188a68 · Record extracted from the openFDA bulk export of October 29, 2026. Spotted an error? Report it — include the imprint and what looks wrong.