What Works Skin — Independent · Evidence-First · Ad-FreeIssue 014 · 20 April 2026 · Next: 04 Maywhatworksskin.com
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Concern · Recovery · Post-isotretinoin

P. 36 · GUIDE

The 6-month
reset window.

How to rebuild a routine after a course finishes.

The skin coming off oral isotretinoin is differently dry, differently reactive, and differently sebum-suppressed than the skin that started the course. The reset routine matters as much as the course itself — and is almost never discussed at the prescribing visit.

— § 01

The triggers worth tracking.

Persistent dryness 4–8 weeks after course end

Sebum production takes months to normalise. Cream-based, ceramide-rich routine continues post-course.

88%
Reactive episodes from previously-tolerated products

The barrier is still rebuilding. Reintroduce one product at a time over 4–6 weeks.

62%
Lingering lip and perioral dryness

Months, not weeks, to fully resolve. Continue petrolatum lip protection through month 6.

78%
Hypersensitivity to retinoids and acids

Even a modest tretinoin can sting in this window. Wait at least 6 months before resuming.

68%
⁂

— § 02

Ingredients that actually work.

Tier
Molecule
Role
Evidence
Tier A
Ceramide-rich cream cleanser
Foundation
Lifetime of post-iso patients tolerate cream cleansers indefinitely. Not a temporary swap.
Tier A
Ceramide + cholesterol cream
Barrier rebuild
Twice-daily for at least 6 months post-course. The most consequential step.
Tier A
Petrolatum-based lip ointment
Lip recovery
Continue 6 months post-course. The lips heal slowest.
Tier A
Mineral SPF 50+ daily
Photoprotection
Skin remains UV-sensitive; PIH risk is elevated through month 6.
Tier B
Azelaic 10% (after month 3)
Maintenance
Gentle re-introduction of pigment / anti-inflammatory work. Avoid harsher actives until month 6.
Tier A
AVOID retinoids × 6 months
Trigger removal
Universal. Starting tretinoin at month 2 is a common, painful mistake.
⁂

— § 03

The protocol.

  1. Phase 01 · Month 0–2

    Heal

    Cream cleanser, ceramide cream twice daily, petrolatum lip ointment, mineral SPF. Nothing else.

  2. Phase 02 · Month 3–4

    First active

    Niacinamide moisturiser. Optional azelaic 10% PM if comedones return. No retinoids yet.

  3. Phase 03 · Month 6+

    Slow expansion

    Reintroduce retinoid at low concentration, twice weekly. Patience pays the dividend the course earned.

Bottom line

The course is the headline event; the recovery routine is the part that determines whether you maintain or relapse. Six months of patience will preserve the result; two months of impatience will compromise it.