An alternative to the power industry
Eleutherococcus gel is available at any pharmacy, lasts for 4 sessions (on average). Take it according to the instructions.
Ginseng in granules – 5 pieces in sweat if you need to be awake for three hours, 10 pieces last for 5 hours, 15 to 20 pieces – for 10-30 hours.
Green tea + 1 lemon wedge + 1 teaspoon of honey. Perfectly invigorates. It lasts for 2 hours and relieves nervous tension. It helps very well before exams, important meetings, etc.