hi anne,i got blood pressure pills and thyroxine mixed up,took too many blood pills, was a few days before i noticed,i was so tired i wasnt paying attention and they are about the same colour,mind you i got a strong lecture and full m.o.t from gp so it wasnt all bad and i was given a blood test then lower dose of thyroid meds,so scary at the time,now very very careful,dorothy