Q&A for How to Unclog a Syringe

You can put a needle through the opening of the syringe if there's some particulate matter blocking the syringe. Keep in mind that the syringe cannot be used medically or should not be used for any medical purposes because this will make the syringe unsterile.

You can unclog a syringe with dried blood in it by removing the syringe needle with a pair of pliers or by unscrewing it, filling a container that can hold the needle and syringe with hot water, and soaking them in the water for about 5 minutes. Then, remove the needle and syringe and reattach them, pull some of the water into the syringe through the needle and push it out by pressing on the plunger to force out any remaining pieces of the clog.

No, it's really unsanitary and unsafe to use the same syringe and needle on yourself twice. It can spread disease and potentially cause an infection. To be safe, discard both the needle and the syringe in an appropriate disposal container.

Most plungers on a syringe can be removed simply by pulling it all the way to the end, then pulling it out of the syringe with a swift tug. Some syringes have a plunger that needs to be rotated in order to be removed. Pull the plunger to the end of the syringe and rotate it to unscrew it to remove it.