Purellan and Purellan are both trade names and the generic name is finasteride tablets, only the manufacturers are different, so they should not be taken at the same time, and patients can just take one of them. Both Finasteride tablets can be used to treat and control BPH and to prevent urological events, such as reducing the risk of acute urinary retention and the need for transurethral resection of the prostate, as well as reducing the size of the enlarged prostate and improving urinary flow. There is no difference in efficacy. Because the main ingredient in both drugs is finasteride, they produce the same side effects, such as rashes, decreased libido as well as ejaculation disorders, breast enlargement, and breast tenderness. There is also dizziness, decreased blood pressure, and constipation. It is contraindicated for women, children and those who are allergic to Finasteride. These two Finasteride tablets are not recommended to be taken at the same time because they have the same efficacy and side effects, so patients can just take one of them. The medication should also be taken in accordance with the doctor’s instructions, and should not be used privately.