Ephedrine alkaloids-free ephedra herb extract, EFE, has no adverse effects such as excitation, insomnia, and arrhythmias - Takemoto, H; Takahashi, J; Hyuga, S; Odaguchi, H; Uchiyama, N; Maruyama, T; Yamashita, T; Hyuga, M; Oshima, N; Amakura, Y; Hakamatsuka, T; Goda, Y; Hanawa, T; Kobayashi, Y (Biol Pharm Bull, 2018)