Opiates are a category of alkaloid drugs derived from opium, a product of opium poppies. At the present time opium itself is illegal in many areas of the world. | The poppy flower (left) grows into the fruit (right), which exudes sap containing a number of opiate compounds when it is cut. |
Opiate | 3-D molecular structure | Click to stop/start molecules spinning
Other links below will highlight sections of molecules. |
Morphine is a purified opium extract, used medically for pain relief.
As well as being highly effective, it is also highly addictive, and must only be used under strict supervision. It is more likely to be used for pain relief in terminally ill patients. |
Morphine is the most common active ingredient naturally found in opium.
The morphine molecule contains several ring structures, and is said to be aromatic. |
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Heroin (diacetyl morphine) also has pain-killing properties but it has a very poor reputation as an illegal drug, which is very addictive. | Heroin is a semi-synthetic opioid synthesized from morphine.
The two additional acetyl groups make the molecule more soluble, causing it to be more effective when injected. They are gradually removed from the molecule as it passes through the liver, reducing its effect. |
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Codeine (methyl morphine) is often used for pain relief, either on its own or in combination with other drugs such as paracetamol. |
Codeine is also found in lesser quantities in poppy extract.
The codeine molecule is the same as morphine with a methyl group (-CH3). |
Cannabis sativa - also known as hemp - has been cultivated in various parts of the world for the production of fibres for textiles.
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Certain varieties contain chemicals which affect the brain and body function, and these are especially concentrated in the flowers. It is considered as an illegal drug in many parts of the world. |
These chemicals derived from cannabis are called cannabinoids. Tetrahydrocannabinol (THC) is the main component of cannabis.
In some countries, a synthetic form has been made available for evalution as a medical drug. |
This molecule has 4 hydrogens which make it different from the basic compound cannabinol which does not have the same effects. |