Non-Arteritic Anterior Ischemic Optic Neuropathy
Patients with NAION (non-arteritic anterior ischemic optic neuropathy) risk factors may face a sudden loss of vision in one or both eyes. This medicine should be used with caution and if a loss of vision occurs, the medicine should be discontinued.
Loss of Hearing
Usage of this medicine may cause a sudden decrease or loss of hearing
, ringing in ears (tinnitus
), and dizziness
. If you experience any of these symptoms, you should should stop the use of the medicine.
Existing Heart Disease
Patients with any prior history of heart diseases may have a higher risk of heart attack. Such patients should use this medicine with caution.
Some patients may have a prolonged erection lasting more than 4 hours, or a painful erection lasting more than 6 hours. In this happens, you should consult with your doctor immediately.
Low Blood Pressure
In patients using low blood pressure medicines and Sildenafil together, the blood pressure can drop significantly. This can result in dizziness
, lightheadedness, and fainting
. Such patients should first establish a stable regimen for their low blood pressure medicines and then start at a lower dose for Sildenafil.
Use of Ritonavir
In patients using Sildenafil along with Ritonavir, it can result in decreased blood pressure, loss of consciousness, and prolonged erection. For such patients, lower dosage of Sildenafil is recommended.
Other Erectile Dysfunction Medicines
The combined use of Sildenafil with other erectile dysfunction medicines may result in further lowering of the blood pressure. Combined use of multiple erectile dysfunction medicines is not recommended.