Hydroquinone Cream: Is It Legal in Singapore?

Hydroquinone is a prescription depigmenting cream that reduces melanin production by inhibiting tyrosinase. In Singapore it is not permitted in cosmetic products and is supplied through a doctor. It is used for melasma, sun spots and post-inflammatory marks in supervised courses with breaks, because prolonged unsupervised use can cause exogenous ochronosis, a blue-grey darkening.

On this page

Key Facts
What is hydroquinone and what does it do?
What does the evidence show?
Who should avoid hydroquinone?
Is hydroquinone available in Singapore?
Prefer Not to Use WhatsApp?
Questions Patients Actually Ask
How long can you use hydroquinone cream?
What is hydroquinone ochronosis, and can it be reversed?
Availability in Singapore

Key Facts

What it is: A prescription depigmenting medicine that strongly inhibits melanin production, used under medical supervision for melasma and hyperpigmentation.
Also called: 1,4-dihydroxybenzene; HQ
Pairs with: Strict sunscreen, gentle moisturiser; combinations with retinoids or corticosteroids only as prescribed
Who should take care: It should not be used without medical supervision, during pregnancy or breastfeeding unless a doctor advises, or on broken or inflamed skin.
In Singapore: Hydroquinone is not permitted in cosmetic products in Singapore and is controlled as a prescription medicine supplied through a doctor.

What is hydroquinone and what does it do?

Hydroquinone inhibits tyrosinase, the enzyme that drives melanin production, and is also toxic to overactive melanocytes, reducing pigment production more strongly than most cosmetic brighteners. It is used medically for melasma, post-inflammatory hyperpigmentation and sun spots, sometimes in triple-combination creams with a retinoid and a mild corticosteroid. Because of its strength, it is normally used for defined periods with breaks, rather than continuously, and under review by a doctor. It lightens excess pigment over weeks to months but does not prevent recurrence, so sun protection and maintenance with gentler actives follow. This entry is educational; strength and duration are decided by a doctor. [1]

A woman by a window, hand resting against her cheek, skin evenly lit

“It lightens excess pigment over weeks to months but does not prevent recurrence, so sun protection and maintenance with gentler actives follow.”
Dr Sin YongOn what hydroquinone can and cannot do

What does the evidence show?

Hydroquinone has decades of clinical use and many trials in melasma and hyperpigmentation, and it serves as the comparator against which many newer agents are tested. Reviews support its efficacy while highlighting safety concerns with prolonged or unsupervised use. A systematic review of exogenous ochronosis links this blue-black discolouration mainly to long-term use, including of products bought without supervision, which is why medical review matters.

Who should avoid hydroquinone?

It should not be used without medical supervision, during pregnancy or breastfeeding unless a doctor advises, or on broken or inflamed skin. Prolonged use can cause exogenous ochronosis, a blue-grey darkening that is difficult to reverse, and irritation can trigger rebound pigmentation in darker skin. People with sensitive skin may develop contact dermatitis.

Is hydroquinone available in Singapore?

Hydroquinone is not permitted in cosmetic products in Singapore and is controlled as a prescription medicine supplied through a doctor. The Health Sciences Authority has repeatedly warned about unregistered lightening creams, often sold online, found to contain hydroquinone or mercury. Use only products obtained through a doctor or legitimate pharmacy.

If a dark patch, breakout or irritation is not responding to what you are using, the next step is a diagnosis rather than another product. See the Skin A–Z library for related ingredients.

Prefer Not to Use WhatsApp?

Use the short enquiry form instead →

Leave your name, mobile number and email and the clinic will contact you directly. No obligation.

Thank you — your enquiry has been received. The clinic will contact you during opening hours (Mon–Fri 10am–8pm, Sat 11am–3pm).

Or continue on WhatsApp instead →

Prefer a preliminary view first? You can also WhatsApp a photo of the area for Dr Sin Yong to review before you decide on a visit.

Questions Patients Actually Ask

What is Hydroquinone used for?+

A prescription depigmenting medicine that strongly inhibits melanin production, used under medical supervision for melasma and hyperpigmentation.

Who should avoid Hydroquinone?+

Can Hydroquinone be combined with other skincare?+

It is commonly paired with Strict sunscreen, gentle moisturiser; combinations with retinoids or corticosteroids only as prescribed; introduce one new active at a time and stop if irritation develops.

Is hydroquinone legal in Singapore?+

Yes, as a prescription medicine. Hydroquinone is not permitted in cosmetic products in Singapore, so a cream sold over the counter, online or in a salon as a lightening product should not contain it. It is supplied through a doctor after the pigment has been assessed, and the Health Sciences Authority has warned about unregistered creams found to contain hydroquinone or mercury.

What happens when you stop using hydroquinone?+

Pigment that has lightened does not usually darken straight away, but the tendency behind melasma and sun-driven pigment remains, so marks can return with sun exposure, heat or hormonal change. That is why stopping is planned: maintenance with gentler agents such as azelaic acid, a retinoid or tranexamic acid, and daily broad-spectrum sunscreen, continue after the course ends.

Is hydroquinone suitable for Asian or darker skin?+

It can be used in Asian and darker skin under supervision, but two risks are weighed more carefully. Irritation can trigger post-inflammatory hyperpigmentation, and exogenous ochronosis is reported more often in darker skin with prolonged use. Courses are kept time-limited, strength is chosen conservatively, and the skin is reviewed rather than left on the cream indefinitely.

Medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last updated 7 September 2026 · Editorial policy

How long can you use hydroquinone cream?

Hydroquinone is used in courses rather than indefinitely, with the length set and reviewed by the prescribing doctor. A course commonly runs for a few months, after which the skin is reassessed. If the pigment has improved, hydroquinone is tapered or paused and maintenance continues with gentler agents and strict sun protection; if nothing has changed, the diagnosis and the plan are revisited rather than the cream simply continued.

The reason for the limit is safety. The risk of exogenous ochronosis rises with long-term, continuous use and with higher strengths, and much of the published harm comes from products used for years without supervision. Irritation is the other limit: an inflamed patch of skin can respond with more pigment, which matters particularly in darker skin.

Courses may be repeated after a break when a doctor considers it appropriate, sometimes in a combination cream with a retinoid and a mild corticosteroid. Strength and timing are decided individually, and this page does not give dosing advice.

What is hydroquinone ochronosis, and can it be reversed?

Exogenous ochronosis is a blue-black or grey-brown darkening of the skin caused by long-term hydroquinone use, in which pigment-like deposits form in the dermis. It typically appears where the cream was applied, such as the cheeks, temples and jaw, and can look like worsening melasma, which sometimes leads people to apply more cream.

It is reported more often in darker skin types, with prolonged use and with high-strength or unregulated products, although it can also follow lower strengths used for long periods. Dermoscopy can raise the suspicion, and a skin biopsy confirms it.

The first step is stopping hydroquinone. Ochronosis is difficult to treat: improvement, where it occurs, is slow and partial, and approaches such as certain lasers have been reported with mixed results. Prevention through supervised, time-limited courses is far more reliable than treatment, which is why the cream is prescribed with a plan for when it stops.

Hydroquinone and the alternatives for hyperpigmentation
Option	What it does	What it cannot do	Typical recovery	Who it tends to suit
Hydroquinone cream (prescription)	Inhibits tyrosinase and reduces melanin production in overactive melanocytes	Prevent recurrence, or be used continuously without review	Redness or irritation at first in some people; ochronosis risk with prolonged use	Melasma, sun spots and post-inflammatory marks, in supervised courses
Azelaic acid	Moderates melanin production and calms inflammation	Clear deep dermal pigment or replace sun protection	Mild stinging or itch in the first weeks	Sensitive or acne-prone skin, maintenance between hydroquinone courses, and pregnancy where a doctor advises
Topical retinoids	Speed up skin cell turnover so pigment is shed sooner, and help other actives work	Act quickly on their own; prescription-strength forms are avoided in pregnancy	Dryness, peeling and irritation in the first weeks	Combination regimens, sun-damaged skin and maintenance
Tranexamic acid (topical or oral)	Interferes with the signalling that stimulates melanocytes, particularly in melasma	Remove established sun spots; the oral form is a prescription medicine that needs screening for clotting risk	Usually minimal; the oral form is reviewed by a doctor before starting	Melasma, alongside sun protection and topical therapy
Laser toning or pico laser (in clinic)	Breaks up pigment with controlled light energy at conservative settings	Prevent melasma recurrence; aggressive settings can worsen pigment in darker skin	Mild redness for a short period; varies with settings	Pigment that has plateaued on topicals, once the pigment type is diagnosed
Daily broad-spectrum sunscreen	Reduces the ultraviolet and visible-light stimulus that drives pigment	Lighten existing pigment on its own	None	Everyone using any lightening treatment; tinted formulas help in melasma

Hydroquinone (prescription)