Vitamins are organic compounds essential for normal physiological functions. However, some of them are not synthesized endogenously by the body and therefore have to be sequestered in small quantities from the diet.
The World Health Organization (WHO) describes the rational use of medicines as, “patients receive medications appropriate to their clinical needs, in doses that meet their own individual requirements, for an adequate period, and at the lowest cost for them and their community.”
The guidelines for clinical practice are focused on the preferred approaches to medical problems exhibited by scientifically valid research. These are supported by well-organised clinical, double-blind, placebo-controlled and large-scale population studies, and their meta-analysis.
Sinusitis affects about 1 in 8 adults in the United States, resulting in over 30 million annual diagnoses. Sinusitis is the fifth most common diagnosis in the world; more than 1 in 5 antibiotics prescribed in adults are for sinusitis.
Chronic pain can be a serious consequence of surviving cancer. The prevalence of pain in cancer survivors has been reported to be as high as 40%.
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