My mother is 45 years .from past 2 years she is facing the problem of forgetting few things happened in the past and also she became so weak. We started using some medicines like ativan, salon,cita, kefive and also even consulted homeopathy but she is unable to come back to normal and even some side effects poped out .one of my family member suggested it may be due to vit b12 deficiency should I consider it and take a test ?or should I consider continuing the medicines.