Every man who use Viagra must know, what drugs will affect this drug. Your urologist may recommend don’t use this drug with:
vardenafil (Levitra)
avanafil (Stendra)
tadalafil (Cialis)
All these drugs are similar. Tell urologist or provider about all drugs you use for your problem, especially: cimetidine (Tagamet HB, Tagamet,); imatinib (Gleevec); nefazodone; conivaptan (Vaprisol); isoniazid; bosentan (Tracleer); medicines to treat a prostate disorde or high blood pressure; antifungal medication; HIV/AIDS medicine; an antibiotic; blood pressure or heartdrugs.
More information you can get from your  Dr.!

If you before take Viagra visit an urologist, he may tell you that this drug can have side effects and if you have any of SE, call him at once and stop taking Viagra:  vision changes; irregular heartbeat;stuffy nose; memory problems; sudden vision loss;  swelling in your ankles/hands/feet; headache; fainting;general ill feeling; sudden hearing loss; nausea, back pain; redness in your neck/face/chest;heavy feeling and other.
You should call your urologist and ask him about all side effects of Viagra and other important information about this drug. Viagra is very effective drug, which you can buy online!

He visited a doctor, when noticed that had a great problem with erection. The urologist prescribed him Viagra. He takes Viagra exactly as prescribed by his urologist and follows the directions on his prescription label. The doctor said that my husband never mustn’t take it in smaller or larger amounts.
When we want to have sex, my husband takes Viagra with water on an empty stomach and thirty minutes  before sexual activity. But specialist gave advice, that he mustn’t take this drug more than once per day.

If one day during your sex you noticed that you had a bad erection, you needn’t join the ‘Impotence’ club. There are many causes for the occasional non-performance:

• Being obese or overeating
• Drug abuse, smoke or alcohol
• Overwork
• Guilt of an extramarital relationship
• Pressure
• Lack of exercise
• Problems in your sex life
• Anxiety and tension

But if for a long time you have a bad erection, we recommend a visit to the urologist,  who probably will recommend Viagra, because this drug is very popular and very effective.