Antonyms for the word "soporifics" are terms that refer to things that promote wakefulness, alertness or activity. There are several antonyms for this word, including stimulants, energizing agents, invigorating substances, and revitalizing compounds. Examples of stimulants include caffeine, amphetamines, and nicotine, which enhance energy levels and promote alertness. Energizing agents such as ginseng, guarana, and green tea are also antonyms for soporifics. On the other hand, substances that invigorate the body include exercise, fresh air, and sunlight. Finally, revitalizing compounds such as vitamins, minerals, and herbal supplements provide a natural way of increasing vitality and promoting wakefulness, thus countering the effects of soporifics.