yes the prayer has the power to heal anything in the world but you must prayer with a whole heart then only the prayer will heal anything other wise it is like a light in a air.
Prayers may add to self confidence and may assure that the patient is getting better. This affects psyche. Again this will depend on an individual's mind set.
The notion that prayers can cure is a superstition. Even Mritunjaya Yagna could not save Dhirubhai Ambani.
Prayers have only some psychological affect and nothing else. When everything else fails, people turn to prayers. Even doctors advise to pray when treatment fails. The Christian churches hold mass prayer meetings for 'Changai' or 'healing'. These may be well intended but are a futile exercise.
Yes, when everything seems to fail there is only thing that is available to us and that is prayer. It is priceless and doesn't cost anything and very often comes handy in healing oneself when we are suffering from agony or physical sufferings....
Yes according to believers the god answers prayers.God seems to be interacting with our world and answering millions of prayers on planet earth every day.