SANM will be used to treat other symptoms. Assessment of effectiveness of any as needed medication will be conducted at 30 minutes from administration. If PecFent, Epistatus or a combination of both is ineffective, administration of SANM will be considered. Further opioid cannot be given within one hour but benzodiazepine can be given within 30 minutes as is standard practice in this setting. Thus, patients in the experimental arm will receive symptom relief regardless the efficacy of test drugs.