There is no medication for fast erection. Patients with erectile dysfunction can take medications such as sildenafil citrate tablets and tadalafil tablets to help with erection. 1. Sildenafil Citrate Tablets: Sildenafil is effective in treating erectile dysfunction in men. It should be noted that patients taking any dosage of nitric oxide donor and nitrate are forbidden to take sildenafil, and patients suffering from severe vascular disease, aortic stenosis, heart failure and other diseases should take it with caution. Some patients may experience adverse reactions such as vomiting, nausea and dizziness after taking it. 2. Tadalafil tablets: Tadalafil tablets have certain therapeutic effects on erectile dysfunction and erectile dysfunction combined with benign prostatic hyperplasia. It should be noted that this drug is strictly prohibited to use with any form of nitrate drugs, and renal insufficiency, liver injury patients should be careful when using the drug, some patients may have indigestion, headache, back pain and other adverse reactions after taking the drug. If you need to take the drug, it is recommended that patients first go to the hospital for a relevant examination, and under the guidance of the doctor to follow the doctor’s instructions to use the drug, patients should try to avoid private use of the drug caused by physical discomfort.