Dear Dr, I have just come down with a lung/chest infection I am on amoxicillin and it seems to be working although the cough is getting quite bad. I don't often get ill and am just asking really as I started the herbalife programme to gain weight just over a week ago, 3 days into it I got unusually sick, I was just wondering if it was this that was making me sick and whether I should continue taking it or not, it's a formula shake twice a day and a multivitamin 3 times a day. I am 30yrs old, 51kgs and 5.8. Thank you