There cannot be any doubt left in the mind of any intelligent person that this Quran is the word of Allah, and that Prophet Muhammad conveyed that which was revealed to him in full.

-With regard to cures for various diseases, the Quran is a healing for the believers. This includes healing the heart (mental or spiritual disease) and physical healing. Allah mentions honey in the Quran and says that it is a healing for mankind. And He mentions the principle of preserving good health and guarding against sickness. -So whoever says that the Quran says a lot about medicine in this regard is right, but whoever goes beyond that is a kind of exaggeration coined by some Muslims. -The Quran is not a book of medicine. There are some diseases that did not exist previously, so how could their cure come before they had appeared?

There is nothing wrong with reading the Quran from the Mus-haf while lying down in bed or on the ground. For evidence, see the detailed answer.