As of 2015, there is not sufficient evidence to state that Coleus forskohlii is effective for weight loss, according to WebMD. There is also concern that Coleus forskohlii can interfere with treatments for cardiovascular disease by dropping blood pressure too low when combined with blood pressure medication.
No oral dosing of Coleus forskohlii has been shown to offer health benefits, says WebMD. There is evidence, however, that it is effective at increasing heart function impaired by ideopathic congestive cardiomyopathy when administered intravenously. Research indicates that single doses may be effective in treating asthma when Coleus forskohlii powder is inhaled. Initial research suggests that injected doses of Coleus forskohlii may help with erectile dysfunction when combined with other medications. Early research also indicates that eyedrops made with Coleus forskohlii may decrease pressure in healthy eyes, although its effectiveness in glaucoma cases is not confirmed, as of 2015.
The active chemical in Coleus forskohlii is known as forskolin, which is extracted from the roots of the Coleus forskohlii plant, according to WebMD. Coleus forskohlii is also known as Plectranthus barbatus. Coleus forskohlii has a long history of being used to treat asthma and symptoms of heart disorders, such as high blood pressure and chest pain.