This makes it the most commonly used illegal drug both in the world and the United States. The earliest recorded uses date from the 3rd millennium BC. Since the early 20th century, cannabis has been subject to legal restrictions. The possession, use, and sale of cannabis is illegal in most countries of the world.
https://en.wikipedia.org/wiki/Cannabis_(drug)
If outside parties want to ensure that a compound is not considered a scheduled substance or listed chemical, they should write the DEA, Drug and Chemical Evaluation Section (ODE), Office of Diversion Control, 8701 Morrissette Drive, Springfield, Virginia 22152, for an official determination.
http://www.deadiversion.usdoj.gov/schedules/index.html
Section 812 of the Controlled Substances Act (21 U.S.C. §801 et seq.) (CSA) lists substances which were controlled in 1970 when the CSA was enacted. Since then many substances have been added, removed, or transferred from one schedule to another.
http://www.deadiversion.usdoj.gov/schedules/index.html
Types (classes) of pain medication. Pain medications are drugs used to relieve discomfort associated with disease, injury, or surgery. Because the pain process is complex, there are many types of pain drugs that provide relief by acting through a variety of physiological mechanisms. Thus, effective medication for nerve pain will likely have a different mechanism of action than arthritis pain medication.
http://www.rxlist.com/pain_medications/drugs-condition.htm
1 Nonsteroidal anti-inflammatory drugs (NSAIDs) act on substances in the body that can cause inflammation, pain, and fever.  Corticosteroids are often administered as an injection at the site of musculoskeletal injuries. They exert powerful anti-inflammatory effects.
http://www.rxlist.com/pain_medications/drugs-condition.htm
Other Schedule II narcotics include: morphine, opium, codeine, and hydrocodone. Examples of Schedule IIN stimulants include: amphetamine (Dexedrine®, Adderall®), methamphetamine (Desoxyn®), and methylphenidate (Ritalin®). Other Schedule II substances include: amobarbital, glutethimide, and pentobarbital.
http://www.deadiversion.usdoj.gov/schedules/index.html
They also are used for: 1  general anesthesia, 2  sedation prior to surgery or diagnostic procedures, 3  muscle relaxation, 4  alcohol withdrawal and drug associated agitation, 5  nausea and vomiting, 6  depression, and.  panic attacks.
http://www.rxlist.com/benzodiazepines/drugs-condition.htm
Cannabis, also known as marijuana among other names, is a preparation of the Cannabis plant intended for use as a psychoactive drug or medicine. The main psychoactive part of cannabis is tetrahydrocannabinol (THC); one of 483 known compounds in the plant, including at least 65 other cannabinoids.
https://en.wikipedia.org/wiki/Cannabis_(drug)
They last for between two and six hours. Cannabis is mostly used recreationally or as a medicinal drug. It may also be used for religious or spiritual purposes. In 2013, between 128 and 232 million people used cannabis (2.7% to 4.9% of the global population between the ages of 15 and 65).
https://en.wikipedia.org/wiki/Cannabis_(drug)
Drugs and other substances that are considered controlled substances under the Controlled Substances Act (CSA) are divided into five schedules. An updated and complete list of the schedules is published annually in Title 21 Code of Federal Regulations (C.F.R.) §§ 1308.11 through 1308.15.
http://www.deadiversion.usdoj.gov/schedules/index.html
what type of class of drugs is narcotics
Morphine, opium, codeine, and hydrocodone are the types of drugs is narcotics. Narcotics are morphine, opium, codeine, and hydrocodone types of class drugs.