One of the first things people notice after taking sulbutiamine is a rush of energy and a motivation to get things done. Asthenia, abnormal weakness or lack of energy, is the most common reason people visit a physician (Van Reeth, 1999). It is prescribed under the brand names Arcalion and Enerion for this condition. In one study with 1,772 subjects suffering from post-infective asthenia, sulbutiamine completely resolved symptoms in nearly 50% of the participants - the remainder experienced some degree of relief (Shah, 2009). Regular administration acts as a vigilance