- Bladder pain.
- burning feeling in the chest or stomach.
- cloudy or bloody urine.
- increased frequency of urination.
- pain on urination.
- stomach upset.
- tenderness in the stomach area.
How long does it take for sildenafil to take effect?
This medicine usually begins to work for erectile dysfunction within 30 minutes after taking it. It continues to work for up to 4 hours, although its action is usually less after 2 hours. Use only the brand of this medicine that your doctor prescribed.
Who should not take sildenafil?
Many men have no side effects or only mild ones. It can be dangerous to take sildenafil if you also take medicines called nitrates (often given for chest pain). The combination can cause a dangerous fall in your blood pressure. If you’re not sure if you’re taking a nitrate, ask your doctor or pharmacist.
How long does sildenafil last in your system?
On how long its effects may last, sildenafil has a half-life of about three to four hours. This simply means that the active amount of viagra in your body reduces by around half after three to four hours.
Can sildenafil cause stroke?
Although cardiovascular side effects of sildenafil are recognized, little is known about stroke risk in patients who take this drug. We report a patient with multiple strokes in the posterior cerebral circulation in close temporal association with sildenafil use.