Arcalion containing the active ingredient sulbutiamine is a synthetic derivative of thiamine (vitamin B). It remedies the symptoms of weakness by increasing focus, strength (both physical and mental), and energy. It can help the patient become more alert, less lethargic, and more upbeat whilst also helping to stabilize sleeping patterns. The medication is prescribed as a treatment to help patients with a wide range of conditions such as asthenia, chronic fatigue, diabetes, hypothyroidism, renal disease, fibromyalgia, and depression.