NREMT Advanced EMT

Answer - C - Nitroglycerin deteriorates extremely fast once it is exposed to air and light. It also loses its efficacy after the medicine has expired. Thus, if you have a patient who has already taken one nitroglycerin tablet and has found no relief, the nitroglycerine and the container should be checked for expiration date. It would be inappropriate, if the medicine is expired, to recommend taking another dose from the same container.