my 80 yr old mother took one pill of sulfamethoxazole over 2 months ago, and had a terrible reaction... nausea, confusion, dizziness, brain fog, and terrible rash and itching on her legs. She never took another, but still has the itching rash. skin is dry thick scaly with red bumps. on ankles and lower legs up to her knees. Im trying to get her to go to a dr. and maybe your input would help. What kind of dr. would you recommend?