Prescription drugs like kamagra are commonly used to treat impotence and erectile dysfunction in men. Because this drug is prescribed, you must consult your physician to receive it. Getting a prescription from your doctor is still the best option, even though it may be bought online and at local pharmacies. If you want to buy kamagra online, you still have to share the prescription. buy kamagra drug belongs to a class of pharmaceuticals called phosphodiesterase type 5 (PDE 5) inhibitors.