Populus Candicans is a homeopathic remedy for colds. Seems to have a remarkable power over acute colds, especially when accompanied by a deep, hoarse voice, loss of voice. Instantaneous voice-producer. Burning, runny nose. Worse moving; before menses; after food and drink; lifting arms; contact of clothes; after sleep. Better hot applications. Source: Boericke Materia Medica
You can find Populus Candicans Pills at Remedy Source.