Symptoms include dyspnea, retrosternal pain, hoarseness, stridor, lachrymation, cough, expectoration, and in some cases haemoptysis. Guaifenesin syrup or tablets can assist in loosening existing casts for expectoration. Several mechanical techniques are used to dislodge sputum and encourage its expectoration. Most cases reported a progression to a persistent cough, leading to expectoration and sometimes hemoptysis. The first person, in June 2012, had a fever, cough, expectoration, and shortness of breath. Other treatment options may target airway inflammation or may promote mucus expectoration. This cough may be productive, with expectoration of thick, viscous sputum. Acute therapy for PB is often focused on removal or facilitated expectoration of the casts. In humid asthma and constitutional cough this remedy, by checking expectoration, would prove very injurious.