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Another enzyme that breaks down cGMP is phosphodiesterase type 5 (PDE5), which restricts blood flow into the penis and causes erection loss. PDE5 inhibition by Kamagra 50 mg pills cures erectile dysfunction by allowing the cGMP mechanism, which is responsible for creating and maintaining an erection, to be activated by the natural process of sexual stimulation. If you take Kamagra 100mg tablets within an hour of scheduled intercourse, you should be able to get an erection in about 30 minutes that will last for around 4 hours, assuming you are sexually excited. If you are not aroused, Kamagra 100mg tablets will not operate. Read here more about how to use ED pills effectively.