Opiates

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For other uses, see Opiate (disambiguation).

The term opiate refers to the alkaloids found in opium, an extract from the seed pods of the opium poppy (Papaver somniferum L.). It has also traditionally referred to natural and semi-synthetic derivatives of morphine. The term is often incorrectly used to refer to all drugs with opium-/morphine-like pharmacological action, which are more properly classified under the broader term opioid.

The main opiates from opium are morphine, codeine and thebaine. Papaverine is also present, but has essentially no effect on the central nervous system, so is not an opioid. Papaverine is sometimes used as a vasodilator in cardiac patients.

See opioid for a fuller discussion.

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