Herbs that relieve the symptoms of asthma. According to the case the remedy may be an expectorant, antispasmodic, bronchodilator or a combination of each. A large group including:– Belladonna, Black Haw bark, Comfrey, Ephedra, Elecampane, Euphorbia, Evening Primrose, Gelsemium, Irish Moss, Lobelia, Mullein, Senega, Storax, Stramonium, Wild Cherry bark and Wild Yam are all of practitioner use. ... anti-asthmatics