10mg Reta vial - reconstitute with 1ml?

Is it OK to reconstitute 10mg vial with 1ml Bacteriostatic Water? I would like to increase my dosage to 3 or 4mg weekly, but my large* supply of syringes are 50U. 2mg dosage on a 2ml reconstitute is 40U,so I would have to break it up into 2 shots, or split the dosage to bi-weekly.