Which Hydroquinone Strength Is Right for Your Melasma? 2%, 4%, 6%, and 8% Compared

The short answer: there is no single "best" hydroquinone strength. The most common prescription starting point for melasma is 4% in a triple-combination (Kligman-style) cream. Compounded 6–8% strengths are reserved for resistant cases under close supervision. The old over-the-counter 2% no longer exists; the CARES Act made hydroquinone prescription-only in 2020. Every strength is used in time-limited 8–12 week cycles with rest periods, and the choice belongs to your prescriber.

KeyPoints

• Hydroquinone is Rx-only at every strength in the U.S. since the 2020 CARES Act
• 4% triple-combination cream is the typical starting prescription for melasma
• 6% and 8% are compounded strengths for resistant pigment, higher isn't automatically better
• Courses run 8–12 weeks, then a rest period on an HQ-free maintenance formula
• Tranexamic, azelaic, and kojic acid formulas fill the maintenance and HQ-averse roles

EndKeyPoints

What changed with the CARES Act?

For decades, 2% hydroquinone creams sat on drugstore shelves. The CARES Act of 2020 removed hydroquinone from OTC sale, making it prescription-only at any concentration. The practical effect: melasma patients now go through a provider for every strength. Which also means treatment happens with the supervision this ingredient was always supposed to have.

Strength by strength: how prescribers think about it

Two things the table can't show: first, your baseline skin tone matters, deeper skin tones are more prone to irritation-driven pigment, so prescribers often favor moderate strengths with anti-inflammatory support. Second, the formulation around the hydroquinone frequently matters more than the percentage.

Why the Kligman triple cream is usually the vehicle

The modified Kligman formula, hydroquinone + tretinoin + a mild corticosteroid, remains the most evidence-backed melasma approach because each ingredient attacks a different mechanism: hydroquinone suppresses melanin production, tretinoin accelerates pigment turnover, and the steroid quiets the inflammation that would otherwise create new pigment. Our compounded Kligman's Triple lets your prescriber set each component independently, 4% or 6% hydroquinone, tretinoin matched to your tolerance, steroid potency dialed to your skin. For the full protocol walkthrough, see our melasma treatment guide.

Why are courses limited to 8–12 weeks?

Exogenous ochronosis, a stubborn blue-black darkening, is associated with prolonged, high-concentration, unsupervised hydroquinone use. The defense is structural: time-limited cycles (typically 8–12 weeks, occasionally 16 at your prescriber's discretion), then a rest period on a hydroquinone-free maintenance formula before any repeat cycle. This on-off rhythm is standard dermatology practice, and it's why "more weeks at higher strength" is the wrong instinct.

The hydroquinone-free toolkit

• Tranexamic acid (topical 3–5%): targets the vascular and plasmin-mediated side of melasma; also available as prescriber-directed oral TXA capsules for resistant cases after clotting-risk screening
• Azelaic acid (10–20%): brightening plus anti-inflammatory action; often used when pregnancy planning takes hydroquinone off the table
• Kojic acid (1–4%): secondary tyrosinase inhibitor that layers well into combination brighteners
• Niacinamide and alpha arbutin: gentle pigment-transfer blockers suited to long-term maintenance

These build more slowly than hydroquinone but are appropriate for continuous use. Which a chronic, relapse-prone condition like melasma eventually demands.

Getting a compounded melasma prescription in Los Angeles

Generation Pharmacy compounds triple-combination creams from 2% to 8% hydroquinone and a full range of HQ-free brighteners under USP 795, typically ready in 1–2 business days. Visit the melasma treatment page, browse the formulation catalog, or call 424-228-1049 to connect your dermatologist with our pharmacists.