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==Side Effects and Contraindications==
 
==Side Effects and Contraindications==
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Side effects of opioid drugs include:
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* Emesis. This is worst in animals that are not in pain at the time of administration, e.g. when morphine is administered as a pre-operative pre-medication.
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* Negative chronotropic effects
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* Respiratory depression
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* Reduced gastro-intestinal motility. This is of most clinical significance in the horse, which is prone to post-operative ileus.
    
==Drugs in this Group==
 
==Drugs in this Group==
6,502

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