Viagra generally refers to sildenafil citrate, and for patients with both erectile dysfunction and premature ejaculation, dapoxetine hydrochloride and sildenafil citrate can be taken at the same time, but only under a doctor’s supervision. Dapoxetine hydrochloride can be used to treat premature ejaculation. Sildenafil citrate is an oral type 5 phosphodiesterase inhibitor and can be used to treat erectile dysfunction in men. It is usually possible to take both these medications at the same time when suffering from conditions such as premature ejaculation as well as male erectile dysfunction. However, it must be taken under the supervision of a doctor. It should be noted that dapoxetine hydrochloride is contraindicated in people with known hypersensitivity to the product, in patients with significant pathological conditions of the heart, and in patients with moderate and severe hepatic injury; it is also not to be used in conjunction with thioridazine, strong cytochrome P450 3A4 inhibitors, and monoamine oxidase inhibitors. Sildenafil is forbidden to be used in combination with nitrate drugs, and the drug is contraindicated in women, people who are allergic to the product, children, and people whose recent cardiovascular state does not allow them to have sex.