Finasteride tablets generally have no effect on the stomach. The side effects on the gastrointestinal tract are not specified in the instructions for this drug, so this product generally has little effect on the stomach. Adverse effects such as impotence, decreased libido, ejaculatory disorders, skin rash, breast enlargement, breast tenderness have been reported with the use of this product. This product is a 4-azasteroid compound, which is a specific inhibitor of the intracellular enzyme-type reductase in the metabolism of testosterone into the more potent androgen dihydrotestosterone. The drug is used clinically for the treatment and control of benign prostatic hyperplasia and for the prevention of urological diseases. It is contraindicated in people who are allergic to any of the components of the product; pregnant and lactating women; women and children. Patients with large amounts of residual urine or severe reduced urinary flow should be closely monitored for obstructive urinary tract disease; the patient’s mental status should be monitored during administration. If you need to use the drug, it should be used under the guidance of a specialist, not self-medication to avoid adverse reactions.