My question about the people who are using viagra...

Dear Customer,
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What are the side effects of viagra?
1.Headache
2.Dizziness
3.Diarrhea
4.Heart palpitations
5.painfull erections 
6.Prolonged erections
What is the best methods for erectile dysfunction?
1.Drink plenty of water
2.Eat green leafy vegetables like rocca and spinach
3.Take multivitamin tabs like centrum
4.Testosterone booster like alpha test
5.Testoviron injection
6.Viagra(Sildenafil)
7.Surgical intervention
What are the causes of erectile dysfunction?
1.Trauma
2.Varicocele
3.Low testosterone level
4.Stress and anxiety
5.Side effect for meds
We wish you all the best ,
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