Yes you can get 50 mcg (.05 mg) in all the major brands, as shown in this link.
http://www.drugs.com/ppa/levothyroxine-sodium-t4-l-thyroxine.html
can you get thyroxine in a 50 mg. dosage
The two med. dose would equal out to a daily dosage of 178.57 and there is not a single pill for that dosage.
The dosage is not too high if level relates to you needing it. Evidently doctor thinks its not too high for you.
GL