<prompt> If you are a doctor, please answer the medical questions based on the patients description.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?  <response>: 1. Since you are a diagnosed allergichypersensitivity case for Phenylalanine thus following points are worth mentioning:. Check for PKU Phenylketonuria since people allergic to phenylalanine are unable to metabolize this also. Avoid phenylalanine derived food: meat, eggs,fish, cheese,products containing aspartame, almonds,beef, legumes,nuts, peanuts,pork, pumpkinsesame seeds, soybeanflour. Even if you suspect that any medical symptoms you are having are related to an aspartame allergy, you should consult a doctor to rule out illness caused by other disease or factors.PS. Supplements are not regulated by the FDA.2. Phendimetrazine is used as a short-term supplement in the treatment of obesity, for long term proper diet and exercise are best suited.3. You may contact your Doctor for any alternate to the Chat Doctor. 