The pharmaceutical compositions having analgesic effect referred to in this invention are composed of the aconitine ingredients as the active medical ingredients and other acceptable auxiliary ingredients. The active medical ingredients shall at least include the fuziline compound of Formula (I). The drugs exert desirable analgesic effect with low toxicity. They can be made into commonly used oral preparations, injectable preparations and/or external preparations, including ointments, suppositories lotions, medicinal dressings, etc. ##STR00001##