You mustn't keep HGH in freezer! Somatropin (I presume this is what you have) should be kept in a fridge between 2 and 8 degrees centigrade. Then it is good up to 'use by' date. In case of Genotropin Miniquick, they can be kept out of the fridge, in temperatures up to 25 degrees for a month (and need to be used up within this time). My son was on the HGH for years, he has just finished his treatment - BTW I have still some HGH left, sitting in the fridge - so believe me, I know what I am saying