The constituents of Bayer's Tonic Syrup act as a health supplement to boost vigor and vitality and the overall health. Bayer's Tonic Syrup is useful for the elderly, those who suffer from general weakness and those recovering from an illness to boost their energy levels. It also benefits those who are suffering from weakness after undergoing a surgery and owing to certain chronic diseases. People undergoing antibiotic treatment for a prolonged period can also regain their vitality by using this tonic.Use under medical supervision.