MRI is the abbreviation for magnetic resonance imaging. In laymen's terms, an MRI allows your doctor to take an image of your bones, muscles, ligaments, nerves and soft tissues. The technology uses magnetic signals to produce a more detailed and defined image, than say, an X-ray machine.
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, former paramedic. Most likely that is promethazine, frequently known by the trade name Phenergan. It's a common antiemetic (anti-nausea and anti-vomiting). It used to be used even more commonly before drugs like ondansetron (Zofran) came on the market, which have fewer side effects like sedation. Promethazine might still be a preferred agent in some situations including motion sickness, pregnancy, and when sleep is desirable.