Finally i got diagnosed with hypothyroidism today with my TSH at 13! Phew! The doctor has prescribed synthroid - 88 mcg. I am having cognitive/memory issues as well. Is the dose right-not too high or too low? Sorry for the naive question but I am a little unsure as my GP appeared to be a little inexperienced. Also how much time does it take for the symptoms to clear up? - I know it will vary from person to person but just need a ball park figure. Looking forward to some expert advice.