Welcome to HCM,
Find out the cause of this problem.
Go for blood sugar to rule out diabetes
in which this problem is common.
Change the medicine for blood pressure if you are taking.
Many a time this problem is purely psychological so remove the fear of non erection of penis and concentrate your mind exclusively on sex while doing intercourse.
Before sex go for sex play with your partner like fantasy,verbal sex talk and other ways.
You may take Tab. Viagra
after consulting your doctor.
This medicine gives excellent result for erectile dysfunction
Ok and bye.