Arcalion is a medication used to treat a condition called asthenia.
Asthenia is a disorder common to many illnesses, such as chronic fatigue syndrome, diabetes, fibromyalgia, hypothyroidism, postpartum depression, and renal disease. It results in a feeling of weakness, even though actual strength is not lost, and extreme lack of energy.
Arcalion brings properties of boosting energy and increasing focus and strength for those whose own focus and strength seems lacking for whatever reason.