Extended-release morphine
（重定向自Kadian）
Extended-release (or slow-release) formulations of morphine are those whose effect last substantially longer than bare morphine, availing for e.g. one administration per day. Conversion between extended-release and immediate-release (or "regular") morphine is easier than conversion to or from an equianalgesic dose of another opioid with different half-life, with less risk of altered pharmacodynamics.