are you sure the doctors specifically said ephedrine caused the fatty liver?

ephedrine is a sympathetic stimulator and causes increased glucose metabolism in your blood. it actually promotes glycogenolysis (the breakdown of glycogen) and when your glucose and glycogen is depleted it will cause beta-oxidation of your fatty acids to use for energy.

i strongly doubt that ephedrine would cause fatty liver because that is the complete opposite of how the mechanism works. i'm guessing it is some sort of insulin resistance. are you obese? indian? family history of type II diabetes? family history of hypertension? maybe it is the beginning of metabolic syndrome