Can you take Aminolevulinic acid while pregnant?

Topical aminolevulinic acid products used in photodynamic therapy are usually avoided during pregnancy because controlled human safety data are sparse and labeling advises use only if clearly needed. Some topical formulations show negligible systemic absorption, but labels still recommend caution and consideration of alternatives. Oral aminolevulinic acid for intraoperative or imaging use has limited human pregnancy data and animal information is incomplete, so clinicians reserve it for situations where benefits justify potential risks. Before any planned photodynamic therapy or oral ALA, tell your clinician you are pregnant or trying to conceive. For elective skin treatments, providers commonly delay until after delivery; for urgent medical indications, your clinician will discuss risks, alternatives, and timing.