Paxil and diet

My mom, 72, has been sick for a year and a half now with drenching night sweats, chills, fatigue as well as some other symptoms. She has undergone every test imaginable and has been to tons of doctors. Every test is normal and the drs. don't know what is wrong. We recently came to the conclusion that she switched to a generic heart medicine at about the time she became ill as well as recently started to take generic paxil because she thought she was having a nervous breakdown. We have just switched her meds to all name brands to see if this will stop the sweats and her general ill feeling. Has anyone heard that taking generic drugs could do this? Specifically Verapamil and the generic paxil. Thanks.