I'm 5'11", male, 118 pounds. i've lost 40 pounds. at what point is this weight serious? my heart cond making eating hard. what do i do? dr wont help.

Weight loss.: If the numbers you have given are accurate, you have lost about 1/4 of your bodyweight unintentionally. I would go back to your general doctor for an evaluation as to why you have had such weight loss. If the doctor does not evaluate it, you can always consider a second opinion. It doesn't sound normal to me, with the small amount of information I have available here. Good luck.