| Year published | 2009 |
| Literatures (Research papers) |
Miyaoka T, Nagahama M, Tsuchie K, Hayashida M, Nishida A, Inagaki T, Horiguchi J: Charles Bonnet syndrome: successful treatment of visual hallucinations due to vision loss with Yi-gan san. Prog Neuropsychopharmacol Biol Psychiatry 33(2):382-383, 2009. |
| Kampo formulas | yokukansan |
| Remarks | yokukansan |