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The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.