Take this medication by mouth. Take it as directed on the prescription label at the same time every day. Keep taking it unless your care team tells you to stop. Talk to your care team about the use of this medication in children. Special care may be needed.

Side effects that you should report to your care team as soon as possible:

• Allergic reactions--skin rash, itching, hives, swelling of the face, lips, tongue, or throat
• Low blood pressure--dizziness, feeling faint or lightheaded, blurry vision
• Prolonged or painful erection Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
• Blurry vision
• Drowsiness
• Fatigue
• Headache
• Heart palpitations--rapid, pounding, or irregular heartbeat
• Nausea
• Swelling of the ankles, hands, or feet

Our pharmacists will check to see if this medication will cause any interactions with the information in your profile.

This medication may interact with the following:

• Diuretics
• Medications for high blood pressure
• Sildenafil
• Tadalafil
• Vardenafil