Im 17 years old and i take pills of isosupra for my acne.im loosing my apetite, my stomach is aching, and loosing weight a little!is this normal?

See your doctor: I'm assuming you are somewhere other than the U.S., since isosupra is not sold here. It is Isotretinoin (sold in U.S. As Accutane and other brands), and no, those side effects are not normal or common when taking it. A viral illness could also produce those symptoms, so it may have nothing at all to do with the medication. You need to see your doctor to find out exactly what the cause is.