Syringes are also used for preparing phenylephrine bolus injection, as well as for rocuronium, a paralytic used to relax muscles during general anesthesia, and
nitroprusside for blood pressure, heart rate and cardiovascular issues.
Drugs causing methaemoglobinaemia are acetanilide, alloxan, aniline, arsine, benzene derivatives, bivalent copper, bismuth, bupivacaine, chorates, chloroquine, chromates, dapsone, dimethyl sulfoxide, dinitrophenol, exhaust fumes, ferricyanide, flutamide, hydroxylamine, lidocaine, metoclopramide, naphthalene, nitrates, nitrofuran, nitroglycerin, sodium
nitroprusside, paraquet, phenacetin, phenol, phenytoin, rifampin, sulphasalazine and sulphonamides