Reply to thread

When putting HCG and Testosterone in the same needle don't you contaminate the HCG or Testosterone when withdrawing it from the vial?

For example, if I stick the needle in HCG vial and fill the syringe then I take the same needle that was just in HCG and stick it into the Testosterone vial. I would assume there is HCG on the needle itself since I just withdrew it from the vial and now I am placing it in the Testosterone vial leaving behind some trace HCG in the testosterone vial.