Suggest Treatment For Parkinson's, Lou Gehrig's And MS

Hi, may I answer your health queries right now ? Please type your query here...My 27 yo brother is experiencing hand tremors. They have gotten worst and are always there. After talking to a neurologist for 45 mins Parkinsons, Lou Gehrigs Disease and MS were ruled out. Anxiety runs in the family and he tried one anti anxiety med for 1 month with no success. Should he get a 2nd opinion for the diseases mentioned above?