Erectile Dysfunction - Questions and Answers

Medical experts from Harvard University answer common questions about erectile dysfunction.

QUESTION: Blood Pressure Drugs and Libido
Can the high blood pressure drugs Vasotec and Toprol affect the libido?
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QUESTION: Allergy Shots and Impotence
I have been getting allergy shots for bee stings for three years. I have developed impotence in the last year-and-a-half or so. Is there a possible connection between the shots and my problem?
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QUESTION: Testicular Hydrocele
Can a testicular hydrocele cause erection problems?
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QUESTION: Impotence Levels
I am a 20-year-old man who is concerned about impotence. I am capable of having sex, but will at times lose my erection. What could be causing my problems?
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QUESTION: Safer Erectile Dysfunction Medication
With the controversy now over Viagra, is there a safer treatment for erectile dysfunction? I am a 51-year-old insulin-dependent diabetic.
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QUESTION: Women and Levitra
Can women take Levitra?
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QUESTION: Viagra and Levitra Switch
Sometimes I take Viagra and sometimes Levitra. Are there any negative effects to switching between these two drugs?
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QUESTION: Viagra Side Effects
If I take Viagra even though I don't need it, what would the side effects be?
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QUESTION: Viagra and Levitra
I have taken 50 mg Viagra and 20 mg Levitra at various times over the past year, and I've noticed Levitra seems to work better. Isn't the active ingredient in Viagra about the same as the active ingredient in Levitra? Why would I notice a difference between the two?
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QUESTION: Metformin and Erectile Dysfunction
Does metformin affect a man's ability to have erections?
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