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In most climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.

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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.

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Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

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Stevens-Johnson syndrome and Toxic Epidermal Necrolysis syndrome are life-threatening reactions that can result in death. Complications include permanent blindness, dry-eye syndrome, lung damage, photophobia, asthma, chronic obstructive pulmonary disease, permanent loss of nail beds, scarring of mucous membranes, arthritis, and chronic fatigue syndrome. Many patients' pores scar shut, causing them to retain heat.

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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Parts of a muscle Parts of a muscle
Types of muscle tissue. Types of muscle tissue.
Thumb petrissage and direct fingertip pressure along iliac crest to muscle attachments. Thumb petrissage and direct fingertip pressure along iliac crest to muscle attachments.
Production of ATP in Skeletal Muscle Production of ATP in Skeletal Muscle
Intraaortic balloon pump. The balloon deflates during systole, so cardiac output is unimpeded. Intraaortic balloon pump. The balloon deflates during systole, so cardiac output is unimpeded.
Opener Chromatin fibers spilling out of a chicken erythrocyte Opener Chromatin fibers spilling out of a chicken erythrocyte
Video: Evolutionary tree of life Animation

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