Plants of the genus Gelsemium have measurable effects on anxiety-like symptoms in laboratory models (Magnani et al., 2010; Liu et al., 2013; Meyer et al., 2013; Jin et al., 2014). Searching for a possible mechanism of action, we found that very low doses and homeopathic dilutions of Gelsemium sempervirens (Gelsemium) modulate the expression of genes involved in neuronal functions (G-protein cou...