Sildenafil Citrate Tablets are indicated for the treatment of erectile dysfunction in men, and will not produce therapeutic effects in women, but may cause headache, nausea and other adverse reactions. Sildenafil citrate tablets can improve the symptoms of erectile dysfunction by enhancing the action of nitric oxide in the cavernous body of the penis in men, and cannot produce therapeutic effects on women. Instead, women may experience adverse reactions such as headache, dizziness, blurred vision, hot flashes (bouts of fever), nasal congestion, and nausea after taking the drug. Therefore, women should not use this medication. It should also be noted that sildenafil citrate tablets are contraindicated in people who are allergic to this product and the ingredients it contains or who are using nitrate drugs such as nitroglycerin. Men who have the need to use this drug must exclude the contraindications under the guidance of a doctor before using the drug, do not blindly take the drug or increase or decrease the dosage on their own, so as not to cause adverse consequences.