根茎含大叶凤尾蕨甙(creticoside)A、B、C、D。全草含2β,6β,16α-三羟基-左旋-贝壳杉烷(2β,6β,16α-trihydroxy-(-)-kaurane),2β,15α,16α,17-四羟基-左旋-贝壳杉烷[2β,15α,16α,17-tetrahydroxy-(-)-kaurane],2β,6β,15α-三羟基-左旋-16-贝壳杉烯[2β,6β,15α-trihydroxy-(-)-kaur-16-ene],2β,14β,15α,16α,17-五羟基-基旋-贝壳杉烷[2β,14β,15α,16α,17-pentahydroxy-(-)-kaurane],2β,15α-二羟基-对映-16-贝壳杉烯(2β,15α-dihydroxy-ent-kaur-16-ene),2β,16α-二羟基-对映-贝壳杉烷(2β,16α-dihydroxy-ent-kaurane),2β,6β,16α-三羟基-对映-贝壳杉烷(2β,16β,16α-trihydroxy-ent-kaurane),2β,6β,16α-三羟基-对映-贝壳杉烷-2-O-β-D-葡萄糖甙(2β,16β,16α-trihydroxy-ent-kaurane-2-O-β-D-glucoside),2β,15α,16α,17-四羟基-对映-贝壳杉烷(2β,15α,16β,17-tetrahydroxy-ent-kaurane),2β,6β,15α-三羟基-对映-16-贝壳杉烯(2β,6β,15α-trihydroxy-ent-kaur-16-ene),2β,6β,15α-三羟基-对映-16-贝壳杉烯-2-O-β-D-葡萄糖甙(2β,6β,15α-trihydroxy-ent-kaur-16-ene-2-O-β-D-glucoside),2β,14β,15α,16α,17-五羟基-对映-贝壳杉烷(2β,14β,15α,16α,17-pentahydroxy-ent-kaurane),蕨素(pterosin)A、B、C、F、S,大叶凤尾蕨甙(creticoside)A、B、C、E,异蕨甙(isopteroside)C,欧蕨伊鲁甙(ptaquiloside)。
内服:煎汤,10-30g。外用:适量,研末撒;煎水洗;或鲜品捣敷。