Complex sentence: Suxamethonium does not produce unconsciousness or anesthesia, and its effects may cause considerable psychological distress while simultaneously making it impossible for a patient to communicate, so administration of the drug to a conscious patient is contraindicated, except in necessary emergency situations.
Split into simpler sentences: Suxamethonium does not produce unconsciousness or anesthesia, and its effects may cause considerable psychological distress while simultaneously making it impossible for a patient to communicate. For these reasons, administration of the drug to a conscious patient is contraindicated, except in necessary emergency situations.