Can Nizoral cause hair to fall out after extended use?

Nizoral is a shampoo that has properties of being a DHT blocker. Is used extensively for people with hair loss. However, Nizoral is very irritating. If one is getting an inflammatory reaction from the Nizoral, it is possible to lead to hair loss.PRP hair MD.com

No, there is no evidence that Nizoral increases hair fall. I suggest seeing a hair loss expert now to go over your condition and provide you information about your best treatment options. There are great non-invasive options like prp/progesterone which can help with hair regrowth and/or hair transplantation. See an expert. Best, Dr. Emer

Use Nizoral only twice a week. It can promote hair growth in 2% concentration used twice a week. You could have delayed allergy or irritation, But for any reason if you are seeing hair loss, try stopping it and check if the hair fall improves?

Extended use of Nizoral should not cause hair loss unless you develop an allergy which might cause inflammation and hair loss