Top 10 Most Addictive Drugs on Earth

10. Cocaine
Cocaine (INN) (benzoylmethylecgonine, an ecgonine derivative) is a crystalline tropane alkaloid that is obtained from the leaves of the coca plant. The name comes from "coca" and the alkaloid suffix "-ine", forming "cocaine".

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9. Amphetamine
Amphetamine is a potent central nervous system (CNS) stimulant of the phenethylamine class that is used in the treatment of attention deficit hyperactivity disorder (ADHD) and narcolepsy. Amphetamine was discovered in 1887 and exists as two enantiomers: levoamphetamine and dextroamphetamine.

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8. Alcohol
In chemistry, an alcohol is an organic compound in which the hydroxyl functional group (-OH) is bound to a carbon atom. In particular, this carbon center should be saturated, having single bonds to three other atoms.

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7. Seconal
Secobarbital sodium (marketed by Eli Lilly and Company, and subsequently by other companies as described below, under the brand name Seconal) is a barbiturate derivative drug that was patented in 1934 in the US. It possesses anaesthetic, anticonvulsant, anxiolytic, sedative, and hypnotic properties. In the United Kingdom, it was known as Quinalbarbitone.

6. Diazepam
It is commonly used to treat anxiety, panic attacks, insomnia, seizures (including status epilepticus), muscle spasms (such as in tetanus cases), restless legs syndrome, alcohol withdrawal, benzodiazepine withdrawal, opiate withdrawal syndrome and Ménière's disease.

5. Heroin
Heroin, also known as diamorphine, and colloquially as H, smack, horse, brown, black, tar, and other names, is an opioid analgesic synthesized by C.R. Alder Wright in 1874 by adding two acetyl groups

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4. Crystal Meth
Crystal Meth is a neurotoxin and potent psychostimulant of the phenethylamine and amphetamine classes that is used to treat attention deficit hyperactivity disorder (ADHD) and obesity. Methamphetamine exists as two enantiomers, dextrorotary and levorotary.

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3. Crack
Crack cocaine is the freebase form of cocaine that can be smoked. It may also be termed rock, work, hard, iron, cavvy, base, or just crack; it is said to be the most addictive form of cocaine, although this has been contested.

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2. Tobacco
Tobacco is a plant within the genus Nicotiana of the Solanaceae (nightshade) family. There are more than 70 species of tobacco. Products manufactured from dried tobacco leaves include cigars, cigarettes, snuff, pipe tobacco, chewing tobacco and flavored shisha tobacco.

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1. Oxycodone
Oxycodone is a semi-synthetic opioid synthesized from poppy-derived thebaine. It is a narcotic analgesic generally indicated for relief of moderate to severe pain. It was developed in 1916 in Germany as one of several new semi-synthetic opioids in an attempt to improve on the existing opioids.

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