Thyme has a beneficial expectorant and antispasmodic effect on the bronchi and is taken for whooping cough, bronchitis, and coughs, and it is commonly used in cough syrups. Because of its antiseptic effect, thyme is sometimes used in urinary infections. Thymol, a powerful antibacterial constituent found in thyme, is often used in mouthwashes, liniments, and lozenges.