[名词解释] 包膜

无镇痛、成瘾和便秘的中枢性镇咳药是（） ["苯佐那酯","特布他林","苯丙哌林","右美沙芬","可待因"] 下列药物中属于刺激性祛痰药的是（） ["氯化铵","盐酸溴己新","乙酰半胱氨酸","羧甲司坦","喷托维林"] 刺突 衣壳粒（壳粒） 下列药物中用于预防哮喘发作的是（） ["氨茶碱","沙丁胺醇","克伦特罗","倍氯米松","色甘酸钠"] 包膜