Ranunculus bulbosus is a herbaceous plant that grows up to 40 cm high. It blooms from May to July with yellow flowers. Occurs in Europe and North America. Due to its toxicity, the plant is used exclusively in high dilution in homeopathy. The sap contains the non-poisonous ranunculin, a glucoside which is converted into the poisonous alkaloid protoanemonin. Protoanemonin is found in all buttercups in varying concentrations. Due to its irritating effect on the skin and mucous membranes, contact causes reddening and itching, and may also lead to the formation of blisters on the skin: buttercup dermatitis.
The ingredients of the plant have antibacterial, antipyretic and sedative effects.
In homeopathy Ranunculus bullosus is used for neuralgic pain, especially for infectious pain such as zoster neuralgia.