Yes, I told my Doctor that I was Allergic to Phenylaline,  or the fake sugers that put Phenyl in there products.I was tested by a specialist so I know that I am.  Also whenever I drink a Diet Soda with Phenylaline in it My throat swells up and I have difficulty breathing just from one sip.  Well, it seems he is not listening or does not believe me.   Because,  my doctor prescribed Phendimetrazine  35 mg.  which is a derivative of the Phenyl products.    I do not want to end up in a Hospital.   What other medicine can he prescribe instead which is safer for me?
**1. Since you are a diagnosed allergic/hypersensitivity case for Phenylalanine thus following points are worth mentioning