Although often associated with inducing high blood pressure, some painkillers like aspirin, ibuprofen, naproxen and acetaminophen, may cause a sudden low blood pressure.
Usually, painkillers are used with precaution in hypertensive patients. Some of these NSAIDs, ex. ibuprofen, reduce the blood flow to the kidneys. The kidney, which filter the blood, work more slowly, and so fluid builds up in the body. The increased fluid drives up the blood pressure.
Having a fever and sweating, can lead to dehydration and this can be a cause for lower blood pressure.
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