The pregnyl that i buy from pharmacy came with 1 amp of sodium chloride solvent ,usually after i mix the powder with solvent i keep the syringe in refrigerator but after i read on another forum they said to throw the original solvent because it is intended for single use only so to my disappointment it is not good for another 30 days after mixing as I thought , the problem is that i cant find BAC water in my country .So my question is what is the half life after mix with solvent i was hope at least 3 day so i can do 2500 ui eod . Thanks in advance !