Does Bactrim cause hair loss?

This needs an in-person evaluation. I suggest seeing a hair loss expert now to evaluate and go over your condition and provide you information about your best treatment options. There are great non-invasive options like prp/progesterone and/or hair transplantation. See an expert. Best, Dr. Emer

Not to worry. In one study of over 49,000 persons taking Bactrim, 254 (0.62%) reported hair loss. The odds of this happening to you are very low. 

Bactrim (trimethoprim and sulfamethoxazole) rarely causes hair loss. An up close examination and careful review of your medical information can help determine if there is any relationship in your case. Please see a hair physician for guidance if concerns persist. Hair loss from Bactrim has been reported to occur but the reader should note it is rare.

Hair loss is not one of the know side effects of Bactrim. I would look to other causes of your hair loss