Better yet, order from gearboxinc.com. You can order needles and syringes separately, or as one unit. I prefer to order 5ml syringes, 23G 1.5" needles, and 22G 1" needles all separately. Since I inject 3ml per injection, I need the 5ml syringes so that there will be enough space in the syringe for an air pocket in the end to push all the gear out, and also for enough room to aspirate. The 22G needles are for drawing the gear out of the bottle, and the 23G needles for injecting. My recommendation is to get the Terumo syringes and needles. I think these are superior to the BD ones. I have used both. When I first started doing injections, I used BD because that was what they carried at the local CVS, but then I ordered the Terumo ones from gearboxinc, and since then, I will never use the BD again. The difference is night and day. I had many problems with the BD syringes and needles not being able to get the needles securely tightened to the syringes (they would "strip out", so to speak), and also felt that the plunger in the BD syringes would drag a bit while injecting. I have had none of these problems with the Terumo hardware. Never again will I use BD hardware. Just my .02
And as for your original question, I would only reuse syringes if they are thoroughly cleaned and disinfected. I would only do this in a pinch, such as your case where you have run out of hardware and don't want to miss an injection. But since they are cheap enough to buy in bulk, order a couple cycles worth, and replenish your stock when you finish a cycle, and you will never run out. That way if you decide to turn a 10 week cycle into a 16 week cycle, for example, you are covered, and have plenty of time between cycles to replenish your stock.
