Its efficacy maybe explained by its anti-bacterial and anti-viral activity preventing fixation of bacteria and virus on the cells of the mucus membrane and stimulation of the immune system, which would prevent their reproduction.

Also its expectorant action allows the body to expel contaminate mucus making conditions less suitable for the multiplication of bacteria and viruses.

Pelargonium is often used as an alternative to antibiotics, so it is an effective agent for the treatment of acute and chronic infections of the throat, nose and ears.