Hydroquinone: study card

Hydroquinone — Melanin synthesis inhibitor (depigmenting agent). Study the mechanism, listed uses and warnings from the US label on one sourced card.

Generic name
Hydroquinone
Class
Melanin synthesis inhibitor (depigmenting agent)
Mechanism
The selected 4% hydroquinone product describes inhibition of melanin production; its brief label does not explain a detailed molecular mechanism.
Warnings
This formulation contains sodium metabisulfite, which can trigger serious allergic or asthmatic reactions in susceptible people; For external skin use; avoid eye contact and obtain medical advice if irritation becomes severe; Its alpha hydroxy acid can increase sunburn susceptibility during use and for one week afterward; The selected formulation requires a physician's direction for children younger than 12
Read the source label ↗

Label date: 20261009 · For learning, not clinical decisions. US label and brand information; always consult the current source.

Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.

Pronunciation

Hydroquinone: hye-droe-KWIN-ohn

Pronunciation is shown for the US English generic name.

Body system

Dermatology · 18 Drug cards