What harmful substances may counterfeit erectile drugs contain?

Counterfeit erectile drugs may contain harmful substances, including but not limited to exceeding standards such as sildenafil. Sildenafil is mainly used to treat male erectile dysfunction, and some unscrupulous merchants may illegally add excessive ingredients such as sildenafil in sexual health products to achieve the effect of impotence. These sexual health products belong to the food category, and illegal addition of pharmaceutical ingredients may cause serious harm to the human body.