The Food and Drug Administration (FDA or USFDA) is an agency of the United States Department of Health and Human Services, one of the United States federal executive departments. The FDA is responsible for protecting and promoting public health through the regulation and supervision of food safety, tobacco products, dietary supplements, prescription and over-the-counter pharmaceutical drugs (medications), vaccines, biopharmaceuticals, blood transfusions, medical devices, electromagnetic radiation emitting devices (ERED), veterinary products, and cosmetics.

The FDA also enforces other laws, notably Section 361 of the Public Health Service Act and associated regulations, many of which are not directly related to food or drugs. These include sanitation requirements on interstate travel and control of disease on products ranging from certain household pets to sperm donation for assisted reproduction.

The FDA is led by the Commissioner of Food and Drugs, appointed by the President with the advice and consent of the Senate. The Commissioner reports to the Secretary of Health and Human Services. The 21st and current Commissioner is Dr. Margaret A. Hamburg. She has served as Commissioner since February 2009.

A pharmaceutical drug, also referred to as medicine, medication or medicament, can be loosely defined as any chemical substance intended for use in the medical diagnosis, cure, treatment, or prevention of disease.

Medications can be classified in various ways, such as by chemical properties, mode or route of administration, biological system affected, or therapeutic effects. An elaborate and widely used classification system is the Anatomical Therapeutic Chemical Classification System (ATC system). The World Health Organization keeps a list of essential medicines.

A sampling of classes of medicine includes:

Drugs affecting the central nervous system include: hypnotics, anaesthetics, antipsychotics, antidepressants (including tricyclic antidepressants, monoamine oxidase inhibitors, lithium salts, and selective serotonin reuptake inhibitors (SSRIs)), antiemetics, anticonvulsants/antiepileptics, anxiolytics, barbiturates, movement disorder (e.g., Parkinson's disease) drugs, stimulants (including amphetamines), benzodiazepines, cyclopyrrolones, dopamine antagonists, antihistamines, cholinergics, anticholinergics, emetics, cannabinoids, and 5-HT (serotonin) antagonists.

Gary Michael Null (born in 1945) is an American talk radio host and author on alternative and complementary medicine and nutrition. On his talk radio show and in his books and self-produced movies, Null has criticized the medical community, promoted a range of alternative cancer treatments and dietary supplements, and questioned the link between HIV and AIDS.

In 2010, Null reported that he had been poisoned and nearly killed by ingesting one of his own dietary supplements, "Gary Null's Ultimate Power Meal". Null sued a contractor involved in producing the supplement, alleging that it contained more than 1,000 times the dose of vitamin D reported on the label, leading to the hospitalization of Null and six other consumers with vitamin poisoning.

Null was raised in Parkersburg, West Virginia, with his two brothers. He holds an Associate Degree in Business Administration as well as a Bachelor of Science degree from Thomas Edison State College in Trenton, New Jersey. He received a Ph.D. in Interdisciplinary Studies from Union Institute & University, a private distance-learning college in Cincinnati, Ohio. Null's thesis was entitled "A Study of Psychological and Physiological Effects of Caffeine on Human Health." His credentials and the rigor of his Ph.D. program were questioned by Stephen Barrett of Quackwatch. Null is a New York State Certified dietitian-nutritionist.

Milton Friedman (July 31, 1912 – November 16, 2006) was an American economist, statistician, and author who taught at the University of Chicago for more than three decades. He was a recipient of the Nobel Memorial Prize in Economic Sciences, and is known for his research on consumption analysis, monetary history and theory, and the complexity of stabilization policy. As a leader of the Chicago school of economics, he influenced the research agenda of the economics profession. A survey of economists ranked Friedman as the second most popular economist of the twentieth century behind John Maynard Keynes, and The Economist described him as "the most influential economist of the second half of the 20th century…possibly of all of it."

Friedman's challenges to what he later called "naive Keynesian" (as opposed to New Keynesian) theory began with his 1950s reinterpretation of the consumption function, and he became the main advocate opposing activist Keynesian government policies. In the late 1960s he described his own approach (along with all of mainstream economics) as using "Keynesian language and apparatus" yet rejecting its "initial" conclusions. During the 1960s he promoted an alternative macroeconomic policy known as "monetarism". He theorized there existed a "natural" rate of unemployment, and argued that governments could increase employment above this rate (e.g., by increasing aggregate demand) only at the risk of causing inflation to accelerate. He argued that the Phillips curve was not stable and predicted what would come to be known as stagflation. Friedman argued that, given the existence of the Federal Reserve, a constant small expansion of the money supply was the only wise policy.

Sant Shri Asharamji Bapu (Hindi: संत श्री आशारामजी बापू, Gujarati: સંત શ્રી આશારામજી બાપુ, born as Asumal Sirumalani on April 17, 1941), also endearingly called "Bapu Ji", is a self-realized Hindu Spiritual Guru from India. He is also regarded as the Greatest ever saint of India, having uncountable number of devotees which also includes very reputed personalities. Bapu preaches the existence of One Supreme Conscious in every human being and represents a confluence of Bhakti_yoga, Gnana_yoga and Karma_yoga. Under his guidance, an Ashram was started in 1971 at Ahmedabad on the historically significant place where sage Sandipani (Guru of Lord Krishna) used to do Yagya. As of now, the number of Ashrams have surpassed 350. A documentary video "Voice of Consciousness" showed life-sketch of Sant Sri Asharamji Bapu. His teachings have changed the lives of millions and millions of people.

Asumal Sirumalani [Asaram Bapu], born to father Thaumal Sirumalani and mother Menhgiba. Place of birth being Berani village of the Nawabshah District in Sindh (Un-Partitioned Indibaa) on April 17, 1941 (Gregorian calendar). His father was a wealthy businessman.