Before escalating acne treatment, rule out fungal acne.
Published 21 October 2026 · Reviewed by Dr Sin Yong
Isotretinoin is a prescription vitamin A derivative used for severe, scarring or treatment-resistant acne, prescribed and monitored by a doctor. At the clinic, Dr Sin Yong prescribes it himself after an examination and sets the monitoring. If you are taking it, or have recently stopped, aesthetic treatments are timed around it case by case rather than by one fixed waiting period. Whether to start, continue or stop isotretinoin always stays with the doctor who prescribes it.
Isotretinoin is a prescription oral vitamin A derivative for severe, scarring or treatment-resistant acne. It shrinks the oil glands and acts on several acne drivers at once, and it needs strict pregnancy prevention and a doctor's monitoring. Dry lips and skin are expected. Laser and other aesthetic treatments are timed around the course, never the other way round.
What is isotretinoin, and what is it used for?
Isotretinoin is an oral medicine derived from vitamin A. It acts on several drivers of acne at once: it shrinks the oil glands and reduces how much oil they produce, normalises the way skin cells line the follicle so that pores block less readily, and indirectly reduces the bacteria and inflammation that feed on that environment. Because it acts so directly on oil production, and because it needs careful monitoring, it is reserved for acne where the stakes are higher.
Illustrative image — not a patient.
Acne guidelines from the American Academy of Dermatology strongly recommend oral isotretinoin for severe acne, for acne that has failed standard oral or topical treatment, and for acne that is scarring or causing significant psychosocial burden. In practice that covers cystic and nodular acne, acne that keeps returning after antibiotic courses, and acne that is leaving marks even when it looks moderate. DermNet also lists uses beyond acne, including rosacea and hidradenitis suppurativa, which are prescribing decisions in their own right.
It is a prescription medicine, given after a doctor's assessment and continued under review. The dose, the length of the course and the decision to stop are made by the prescribing doctor against the response, the side effects and the person's circumstances. This page is educational. It explains what the medicine is, what to expect while taking it, and how aesthetic treatment is planned around it; it does not replace the conversation with the doctor who prescribes it. Where acne is severe, unusual or not responding, Dr Sin Yong, an aesthetic physician, refers to dermatology.
If acne is milder, other routes come first. The acne treatment page sets out the topical, oral and in-clinic options, and the doxycycline guide explains how oral antibiotics are used as time-limited courses.
Who is isotretinoin for, and what comes before it?
Isotretinoin is for acne where the stakes are higher: nodules and cysts, acne that is leaving scars, acne that keeps returning after courses of oral antibiotics, and acne that is causing real distress even when it looks moderate. For milder acne, other routes come first, and most people never need it. The decision to start belongs to the prescribing doctor after an examination, not to a search result or a friend's experience.
The table shows where isotretinoin usually sits against the other acne treatments. It is a general map, not a plan for any one person.
Acne picture
Usual first steps
When isotretinoin is discussed
Read more
Comedones (blackheads and whiteheads) without much inflammation
A topical retinoid, with extraction where useful
Rarely, and then when comedones persist despite a proper trial
Not acne: often yeast-driven folliculitis, treated differently
Not used for this
Fungal acne
Some people should not take it, or need particular care: anyone pregnant, trying to conceive or breastfeeding, and people with certain liver, lipid or mood histories, which the prescriber reviews. It is not a cosmetic tablet for oily skin alone. Where acne is severe, unusual or not responding, Dr Sin Yong, an aesthetic physician, refers to dermatology, and his part in the plan is timing aesthetic work safely around the course and treating marks and scars once the acne is controlled.
What does a doctor monitor during isotretinoin?
Monitoring is part of the prescription, and it is the prescribing doctor who sets it. Three areas come up for almost everyone.
Pregnancy prevention
Isotretinoin causes serious birth defects. Pregnancy is excluded before treatment starts and during it, and anyone who could become pregnant is asked to use reliable contraception before, during and for a period after the course, as the prescriber specifies. DermNet notes that isotretinoin has not been shown to affect sperm, so men taking it do not need the same precautions.
Blood tests
DermNet advises that blood tests are generally not needed in an otherwise healthy person, but that cholesterol and triglycerides, liver function and a blood count are checked for higher doses, longer courses or people with particular risk factors. Whether and when to test is the prescriber's call.
Side effects and wellbeing
Dry lips are near universal, and dry skin, nosebleeds, dry eyes and aching muscles are common. Any change in mood, low spirits or unusual thoughts should be reported to the prescriber promptly. Severe headaches with visual change, severe abdominal pain or a blistering rash are reasons to seek medical advice the same day.
None of this is changed by having aesthetic treatment. What changes is the information the treating clinic needs: the dose, when the course started or ended, and any side effects that affect the skin. Bring that information to any consultation, including past courses.
“Isotretinoin dates belong to the doctor who prescribes it. A laser appointment moves to fit the medicine, never the other way round.”
Dr Sin YongOn timing aesthetic treatment around isotretinoin
Dryness on isotretinoin: how to care for lips, skin and eyes
Dryness is expected rather than a sign that something is wrong, and it is managed rather than endured. DermNet's advice is to apply emollients, lip balm, petroleum jelly, sunscreen, eye drops and lubricants frequently and liberally when needed. In a humid climate it is tempting to skip moisturiser; on isotretinoin it is part of the treatment.
Lips: a plain, fragrance-free balm or petroleum jelly, reapplied through the day and at night. Cracked corners that do not heal are worth mentioning to the prescriber.
Face and body: a gentle, soap-free cleanser and a bland moisturiser. Short, cool showers rather than long hot ones. Exfoliating acids, scrubs and retinoid creams are usually paused, because the skin is already thinner and more fragile.
Sun: skin burns more readily, so a broad-spectrum sunscreen is used daily, with shade and a hat outdoors. A tan before any later procedure also raises the risk of pigment change.
Eyes: lubricating drops help dryness. DermNet advises not starting contact lenses for the first time during treatment.
Hair removal: shave rather than wax, because waxing can lift fragile skin.
If dryness is troublesome, the prescriber may adjust the dose; that decision is theirs. Medical-grade facials that hydrate without stripping can be discussed at assessment, but anything that exfoliates or heats the skin is weighed against where you are in the course.
How long after isotretinoin can you have laser, peels or other aesthetic treatments?
There is no single interval that fits every procedure. Older teaching was to wait a long, fixed period after stopping before most procedures. A 2017 systematic review with consensus recommendations in JAMA Dermatology found that this teaching rested on a few small case series from the 1980s, and that there was insufficient evidence to justify delaying several procedures, while still advising against mechanical dermabrasion and fully ablative laser during treatment. DermNet keeps a conservative line for dermabrasion and ablative resurfacing, and says other laser and light treatments may be performed with care. The detail of the laser evidence is set out in isotretinoin and laser timing.
Treatment type
During isotretinoin
What decides the timing
Waxing, threading of brows
Shaving preferred; waxing avoided because fragile skin can lift
Skin fragility at the time
Hydrating facials without exfoliation
Often reasonable, with gentle products
Dryness, irritation, whether acne is active
Superficial peels, nonablative and hair-removal lasers
Recent reviews found insufficient evidence to justify routine delay
Skin type, dryness, settings, the prescriber's view
Skin fragility at entry points, bruising, active acne near the site
Skin type matters in Singapore. Pigment change after any procedure is more likely in Fitzpatrick III to V skin, which describes most patients here, and few of the timing studies were done in Asian skin. That is one reason settings and timing are chosen conservatively and individually rather than copied from a study.
Acne scars after isotretinoin: what comes first?
Isotretinoin is a treatment for active acne; it does not remove scars that have already formed. Rolling, boxcar and ice-pick scars are changes in the dermis that need their own treatment, and red or brown marks left by recent spots are a separate question again, often fading with time and sun protection. The acne scar treatment page explains how scars are told apart from marks.
Control comes before scar work. Resurfacing or needling skin that is still forming new lesions treats a moving target and risks new marks, so the first question is whether the acne is settled. The second is where you are in the isotretinoin course, because some methods can be planned now, some wait and some suit a gentler first step. Scar depth then decides the method: FSX for superficial scars and the S3 Resurfacing Lift for deeper ones, subcision first for tethered scars, and TCA CROSS for ice-pick scars.
What to tell the clinic
Any isotretinoin, current or past, with the dose and when the course started or ended.
Recent laser, peel, microneedling or waxing, and any history of cold sores.
Keloid or raised scarring, slow healing, or dark marks after earlier procedures.
Other acne medicines, including oral antibiotics and hormonal treatment.
Dr Sin Yong does not set a fixed waiting period, because a number would promise more than the evidence supports. The plan is agreed after examination, with the prescribing doctor's view part of it where the timing is close.
Your next step
1. MessageWhatsApp +65 8023 7170 with what is bothering you. A reply comes from the clinic, not a bot.
2. AssessmentDr Sin Yong examines you himself on Orchard Road, with ultrasound where earlier filler is involved.
3. A plan in writingWhat he would do, what he would not, the fee factors, and the option of no treatment.
Every treatment is performed by Dr Sin Yong personally. Singapore Medical Council registered · invited to share his clinical expertise internationally for CLASSYS, DEKA, Fotona, Hironic and Ilooda.
Bring the name, dose and start or stop date of any isotretinoin course. How consultations work.
A pimple injection settles one cyst; it does not replace medicine for the acne itself.
Isotretinoin is avoided in pregnancy; what is used instead is set out under pregnancy acne.
Frequently Asked Questions
Oral isotretinoin is a prescription medicine that reduces sebaceous gland activity and acts on several acne drivers at once. It is considered for nodulocystic or scarring acne, or acne that has not responded to other treatment. It requires strict pregnancy prevention and monitoring, dry lips and skin are expected, and it is not suitable for everyone. Laser treatment is deferred during and after a recent course, as the isotretinoin and laser timing guide explains.
Dry lips are near universal, and dry skin, dry eyes, nosebleeds and aching muscles are common. Skin burns more easily in the sun and is more fragile, so waxing is swapped for shaving. Isotretinoin causes serious birth defects, so pregnancy must be prevented. Any change in mood should be reported promptly, and severe headache with visual change, severe abdominal pain or a blistering rash need same-day medical advice.
Improvement is gradual rather than immediate, and some people notice a flare early in the course before the skin settles. How quickly acne responds depends on the dose, body weight, the type of acne and how the skin tolerates the medicine, which is why the prescribing doctor reviews progress and adjusts the plan rather than promising a timeline at the start.
Many people stay clear after a course, but acne can return, more often after lower total doses or where hormonal acne is involved. A relapse is reviewed by the prescriber, who may suggest topical maintenance, another treatment or, sometimes, a further course. Marks and scars left from earlier acne are a separate question and are treated once the acne itself is controlled.
Isotretinoin can raise blood fats and affect the liver in some people, which is why those are checked where the prescriber advises. Keeping alcohol low during the course is sensible, and heavy drinking should be avoided. Ask the doctor who prescribes it for advice that fits your dose, your blood results and your other medicines.
There is no single interval for everyone. Older advice was a long, fixed wait; a 2017 systematic review found insufficient evidence to justify delay for several procedures but advised against fully ablative laser and mechanical dermabrasion during treatment. Timing is weighed case by case for the method, its depth, your skin type, your dose and healing history, and whether acne is controlled.
No. Never stop or change isotretinoin to suit an appointment; that decision belongs to the doctor who prescribes it, and acne control matters more than any date. Declare the medicine at consultation, with the dose and when the course started, so the aesthetic plan is built around it, including what should wait.
Injectables were not the focus of the timing reviews, so they are weighed on the same principles as any procedure: how fragile the skin is at the entry points, the likelihood of bruising, and whether acne is active near the injection site. Tell the clinic you are taking isotretinoin, and the decision is made after examination.
Waxing is usually avoided during isotretinoin, because thinner, more fragile skin can lift with the wax and leave a raw patch. DermNet advises shaving rather than waxing. Threading also pulls on the skin, so take care, keep the area moisturised and stop if the skin becomes raw or irritated.
No. Isotretinoin is prescribed to control active acne and so reduce the risk of new scars, but rolling, boxcar and ice-pick scars already in the dermis need their own treatment once the acne is settled. Red or brown marks from recent spots often fade with time and sun protection. Scar treatment is planned around the course, case by case.
Isotretinoin capsules are swallowed whole with food, at the same time each day, because the medicine is absorbed better with a meal. A course commonly runs for several months; the dose and length are set by the prescribing doctor from the response, side effects and body weight rather than a fixed calendar. Acne can flare in the first weeks before it settles, which is one reason the course is reviewed rather than judged early.
Tell the prescribing doctor about everything you take. Vitamin A supplements, including multivitamins that contain it, are avoided, because isotretinoin is itself a vitamin A derivative. Tetracycline antibiotics such as doxycycline are not combined with it, because together they raise the risk of increased pressure around the brain. Other acne treatments applied to the skin are usually stopped or reduced, and aesthetic treatments are timed around the course.
References
Isotretinoin and Timing of Procedural Interventions: A Systematic Review With Consensus Recommendations. JAMA Dermatology (Spring LK, Krakowski AC, Alam M et al.), 2017. source
Guidelines of care for the management of acne vulgaris. Journal of the American Academy of Dermatology (Reynolds RV et al.), 2024. source
About this page: written and medically reviewed by Dr Sin Yong, MBBS (NUS), MRCS (Edinburgh) · Last reviewed 6 November 2026 · Illustrative images only, not patients · Editorial policy
