Methotrexate: Several Mechanisms of Hair Loss
Methotrexate is a medication which is widely used in to areas - as a cancer treatment and as a treatment for a wide variety of autoimmune conditions.
Hair loss from methotrexate can occur but is not common. This side effect is estimated to occur in 1-4 % of users. There are two means by which hair loss can occur: hair shedding and hair breakage.
Hair shedding occurs within the first 4-7 weeks and hair comes out by the root. This type of hair loss can range from mild to marked and depends on the dose of the drug used.
Hair breakage occurs within the first 2-3 months. Rather than breaking off at the root, affected patients notice pieces of hair falling everywhere. A close up examination of hairs shows a phenomenon known as trichorrhexis nodosa. This is shown in the photo to the right.
Dr. Jeff Donovan is a Canadian and US board certified dermatologist specializing exclusively in hair loss. To schedule a consultation, please call the Vancouver office at 604.283.9299