Viagra generally refers to sildenafil citrate, and occasional consumption of one capsule for high blood pressure is usually not a problem, but there is a risk of hypotension. Sildenafil citrate improves erectile function in men and is used clinically for the treatment of erectile dysfunction. There is usually no problem for patients with high blood pressure to take this drug once in a while, but this product may cause low blood pressure when combined with antihypertensive drugs, so if you experience any obvious discomfort such as dizziness or headache after using the drug, please stop sexual activities and take care to lie down flat and rest. Adverse reactions that often occur with the use of this product include headache, dyspepsia, visual abnormalities, flushing, dizziness, rash, myalgia, etc. It is contraindicated in patients who are allergic to this product, and in those who take nitrate drugs. It is recommended to consult a physician before using the drug, and should not be used blindly.