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Sildenafil (Viagra®) has two actions that may be of consequence in patients with heart disease. It can lower the blood pressure, and it can interact with nitrates. It should never be used in patients who are taking nitrates.
Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.
Approximately 25% of all reported medication errors result from some kind of name confusion.