Pregabalin
"I was suffering from persistent nausea.  I lost a lot of weight as eating was difficult.  I had many tests and my doctor concluded  the problem was mental, not physical.  He prescribed Pregabalin, 75mg twice a day, and the improvement came almost immediately.  I feel much calmer, much reduced anxiety, have my appetite back, and the nausea mostly eliminated.  I would strongly recommend this medicine.  It does make you want to eat, but this was a boon at first as I had lost a lot of weight, but no other side effects as far as I can tell.  Maybe a bit of drowsiness.  This medicine gave me my life back so give it a go if you have run out of other ideas."