I recently started trt. I went to pick up prescription from Wallgreens and was surprised to get 6 small 200ml vials of Perrigo test cyp. Each vial is supposed to last me 2 weeks as I will be injecting 50ml's twice weekly. I will be drawing from the vial 4 times. Is this ok? I think these are meant for single use. Is the stopper going to hold up? Will the test cyp go bad by week 2? Is Perrigo a good form of test cyp?