Ok i know you should not reuse a syringe or needle and a needle i never would. However i have only one barrel left -one got damaged- for two more injections of Human Chorionic Gonadotropin (HCG) for post cycle therapy (pct) over 4 days. I was planning on doing an injection pushing up the plunger and sealing the opening with a new sterile pin which would be replaced for next injection. From what i see it will be fully sealed so will not be at contamination risk??????????