|Treatments > Medications Used In MS|
Sildenafil is available by prescription and should be used only as directed by your physician. The dose of this medication will be different for different patients. Do not take more of this medication than has been prescribed for you.
The presence of certain medical problems can interfere with the use of sildenafil. Be sure to inform your doctor if you have any of the following medical problems: an abnormality of the penis (including a curved penis or birth defect); bleeding problems; retinitis pigmentosa; any conditions causing thickened blood or slower blood flow (e.g., leukemia, multiple myeloma, polycythemia, sickle cell disease, or thrombocythemia); a history of priapism (erection lasting longer than six hours); heart or blood disease; severe kidney problems; severe liver problems.
Sildenafil has not been studied in combination with other medications that are used in the treatment of erectile dysfunction. At the present time, it is not recommended that these drugs be used together.
Possible Side Effects
Rare side effects that should be discussed with your physician: abnormal vision (e.g., blurred vision, seeing shades of colors differently than before, sensitivity to light); sudden decrease or loss of hearing; bladder pain; cloudy or bloody urine; dizziness, increased frequency of urination; painful urination.
Note: There are a variety of other possible side effects that have not yet been definitely shown to be caused by sildenafil. Therefore, if you notice any other effects that cause you concern, be sure to talk them over with your doctor.
* Since it may be difficult to distinguish between certain common symptoms of MS and some side effects of sildenafil, be sure to consult your health care professional if an abrupt change of this type occurs.