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Definition: Hypnotic or soporific drugs, commonly known as sleeping pills, are a class of psychoactive drugs whose primary function is to induce sleep and to be used in the treatment of insomnia (sleeplessness), or surgical anesthesia.
Context: Yn ogystal, cyhoeddwyd canllawiau cynhwysfawr ar gyfer rhagnodi a monitro cyffuriau hypnotig a chyffuriau lleihau gorbryder, gan gynnwys bensodiasepinau, gan Grŵp Strategaeth Feddyginiaethau Cymru yn 2011 ac fe'u diweddarwyd yn 2016.