Safety
Each ingredient keeps its own warnings. Tretinoin is usually avoided in pregnancy and makes skin sun-sensitive. Clindamycin labels warn of severe diarrhea and colitis, and using an antibiotic alone for a long time can encourage resistant bacteria. Estriol is an estrogen with no approved US label or safety data, and the uterine-lining risk of estrogen without a progestogen applies. The strength of a compounded cream is not checked by the FDA.
Talk to a licensed clinician about your health history and every medication you take before you start.
Legal status
Prescription only; compounded and not FDA-approved. Custom compounded cream is prepared by a compounding pharmacy for an individual prescription. Compounded products are not FDA-approved, and the FDA does not review them for safety, effectiveness or quality. Lawful when a 503A pharmacy compounds it for you on a valid prescription, from ingredients that are USP-grade or parts of approved drugs. It is not FDA-approved, must not copy an approved combination, and estriol is not in any FDA-approved US drug.
What custom compounded cream is
Custom compounded cream contains tretinoin or estriol mixed with actives such as niacinamide, azelaic acid and clindamycin. No custom formula is FDA-approved. Some combinations are approved as fixed products, such as clindamycin 1.2% with tretinoin 0.025% gel, and a compounded cream must not copy them.
Dosing
Cream, mixed by a compounding pharmacy for your prescription, usually once a day at night, as prescribed. In the formulas we track: tretinoin 0.025% to 0.1%, niacinamide up to 4%, azelaic acid 5% to 20% and clindamycin 1% to 1.25%. Anti-aging creams from menopause providers may use estriol instead of, or alongside, tretinoin. Your clinician sets the dose for you.
How well it works
No custom formula has its own clinical trial, and the FDA does not review compounded drugs for safety, effectiveness or quality. The evidence comes from the approved single ingredients: tretinoin and clindamycin for acne, and azelaic acid for acne and rosacea. Individual results vary.
Custom compounded cream cost
None of the online providers we compare publishes a monthly price for it. For a full breakdown, read How much does tretinoin cost without insurance?. For the steps, read How to get a tretinoin prescription online.