• Sildenafil is used to treat erectile dysfunction (ED). In combination with sexual stimulation, the medication works by increasing blood flow to the penis to help a man get and keep an erection.
• This drug does not protect against sexually transmitted diseases such as HIV, hepatitis B, gonorrhea and syphilis, so it’s important to practice "safe sex" using latex condoms.
• 不要与其他含有西地那非或其他用于治疗勃起功能障碍或肺动脉高压的药物（如他达拉非和伐地那非）一起服用。
• • Read the Patient Information Leaflet provided by your pharmacist before you start taking Sildenafil and each time you get a refill.

• Before taking Sildenafil, contact us if you are allergic to it or have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems.
• During your consultation, provide us with your medical history, especially of issues such as:

o Heart problems such as heart attack or life-threatening irregular heartbeat in the past 6 months

o Chest pain/angina

o Heart failure

o Stroke in the past 6 months

o Kidney disease

o Liver disease

o High or low blood pressure

o Dehydration

o Penis conditions such as angulation, fibrosis/scarring or Peyronie's disease

o History of painful/prolonged erection (priapism)

o Conditions that may increase the risk of priapism such as sickle cell anemia, leukemia and multiple myeloma

o Eye problems such as retinitis pigmentosa, sudden decreased vision and NAION

• This drug may make you dizzy or cause vision problems, especially when combined with alcohol or marijuana (cannabis). Do not drive, use machinery or do anything that requires alertness or clear vision until you can do so safely. Limit alcoholic beverages, as they can worsen symptoms. Let us know if you are using marijuana.
• Discontinue medication if you experience persistent lightheadedness. Monitor your blood pressure regularly to make sure it’s not too low.
• Before having surgery, tell your prescriber about all the products you use, including prescription drugs, nonprescription drugs and herbal products.

• Drug interactions may change how your medications work or increase your risk for serious side effects.
• This webpage does not contain all possible drug interactions. Keep a list of all the products you use, including prescription/nonprescription drugs and herbal products, and share it with your prescriber.
• Do not start, stop or change the dosage of any medicines without your medical provider's approval.
• Sildenafil can cause a serious drop in your blood pressure when used with nitrates possibly leading to dizziness, fainting and in rare cases heart attack or stroke. Do not use Sildenafil with any of the following: certain drugs used to treat chest pain/angina, including nitrates such as nitroglycerin and Isosorbide, amyl nitrite and recreational drugs containing amyl nitrate, butyl nitrite or nitroglycerin known as "poppers.”
• If you are also taking an alpha blocker medication like Doxazosin or Tamsulosin to treat an enlarged prostate (BPH) or high blood pressure, your blood pressure may get too low—putting you at risk for dizziness or fainting. Your medical provider may start treatment with a lower dose of Sildenafil to minimize your risk of low blood pressure.
• Other medications can affect the removal of Sildenafil from your body, which may affect how Sildenafil works. Examples include:

o Azole antifungals such as Itraconazole and Ketoconazole

o Macrolide antibiotics such as Clarithromycin and Erythromycin

o HIV protease inhibitors such as Ritonavir and Saquinavir

o Mifepristone

o Rifampin

• • Riociguat may interact with this drug.
• • Do not take this medication with any other product that contains Sildenafil or other similar medications for conditions like pulmonary hypertension such as Tadalafil or Vardenafil.

If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call your local poison control center at 1-800-222-1222 right away. Symptoms of overdose may include severe dizziness, fainting or painful/prolonged erection.

• Store at room temperature away from light and moisture.
• Do not store in the bathroom. Keep all medications away from children and pets.
• Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.

Sildenafil is a safe and effective treatment for erectile dysfunction when taken as directed by a healthcare provider. Before deciding whether you should be prescribed Sildenafil, your healthcare provider will check if you have any underlying health conditions and if you’re taking certain other medications that could make Sildenafil less safe for you. See Important Safety Information.