ero by HOT - ENERGY DROPS In our Energy Drops we have the well-known active ingredients such as Guarana & Taurine -which for more endurance are known - supplemented with L-Argenine, so that you and he can have more stamina and increased libido. To achieve ideal results, it is advisable to take these drops regularly over a longer period. You can take these drops but also just before the desired effect.