Abstract
Achyrocline satureioides is a native species of Brazil, known as Macela. Its flowers are used as anti-asthmatic, antispasmodic and antiepileptic agents. This monograph is the result of research to validate the use of flowers as antispasmodics, presented by Rodolpho Albino through the first Brazilian pharmacopoeia, from the 20th century. The research was carried out by searching for articles in PUBMED, EMBASE and BVS databases, using specific masks. Preclinical studies have shown that the hydroalcoholic extract contains flavonoids quercetin, luteolin, isoquercitrin and 3-O-methylquercetin and phenolic compounds such as caffeic acid, ferulic acid and isomers of dicaffeoylquinic acid that are responsible for the antispasmodic activity, involving the relaxation of smooth muscle via modulation of calcium influx, in addition to possible cholinergic action. No serious toxicological effects were observed in in vitro studies but use in high doses may interfere with reproductive and endocrine parameters, which justifies caution in populations such as pregnant and lactating women, among others. It is worth noting that this species is included in the Phytotherapeutic Formulary of the Brazilian Pharmacopoeia, and the same indication for use has been validated. Further randomized clinical studies are recommended here, although its traditional use has been validated.