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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
By definition, when a medication is administered intravenously, its bioavailability is 100%.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.