This section is from the book "A Practitioner's Handbook Of Materia Medica And Therapeutics", by Thos. S. Blair. Also available from Amazon: A Practitioner's handbook of Materia Medica and Therapeutics.
Grindelia, Gum Plant or Rosin Weed. This agent is toxic in overdoses, producing a paresis of the pneumo-gastric. It is similarly used by all schools. It is indicated in asthmatic breathing and Cheyne-Stokes respiration, chronic spasmodic bronchial coughs, irregular heart action in chronic cough, and to relieve some of the symptoms of hay fever and whooping cough.
Locally applied, it has some reputation in poisoning by rhus toxicodendron, although alcohol and lead acetate are displacing it for this purpose. Dose, f.e., 30 to 60 I. ; ec. tr., 2 to 15 I. ; solid extract, 5 to I5 gr.