Who should avoid or delay starting a custom prescription skin formula?

There is no single exclusion list for all custom creams and serums. The exact ingredients matter. Do not use a product that contains an ingredient you are allergic to, and do not use someone else's prescription. A formula chosen for another person may not be safe for your skin or health history.

Tell the physician if you are pregnant, trying to become pregnant, or breastfeeding. Certain ingredients, including topical retinoids, are generally avoided during pregnancy. Other ingredients also need individual review. Share all medicines and skin products, including treatments from other prescribers. Age, skin conditions, and recent procedures may affect whether you should start.

Ask before applying a prescription to broken, sunburned, infected, or recently treated skin. A suspicious spot or an unexplained rash needs assessment rather than a cosmetic treatment trial. A licensed physician in your state decides whether to prescribe, delay treatment, choose another approach, or recommend an in-person exam. If your health or pregnancy status changes after treatment begins, contact the physician for updated guidance.