This article is from the Impotence FAQ, by Sine Nomine llama@drizzle.com with numerous contributions by others.
Well, yes, *but*... syringes are pretty cheap. Reusing them presents a
minor risk of infection and a much larger risk of pain -- repeated use
dulls the needle and removes the special lubricated coating from the
metal.You could also be introducing bacteria into the vial. If you're
desperate and don't mind the extra pain, you can probably get away
with reusing a needle. Syringes are cheap and fairly easy to obtain,
though; reusing them consistently doesn't make a lot of sense.
 
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