My wife has just completed a several week treatment regimen of fluorouracil ointment for pre-cancers on her face (forehead and temple areas) and has noticed a thinning of hair, most noticeable on the sides of her head. From what we can learn, hair loss seems to be a possible side effect of this drug, but we can t tell how common this is. The information online also indicates that this is a temporary hair loss. If so, when can she expect her hair to grow back? Thank you for any information you can give; as you can imagine, she is quite upset by this.