<s>[INST] My father is suffering from Parkinson s. He has undergone a surgery for hip replacement last week. He has lot of phlegm collected in the mouth and throat and is unable to spit it out by himself. He is under antibiotic treatment and is hospitalised. How long will the phlegm take to subsidise? Will this affect his breathing and reduce the oxygen in his body? Is this the symptom of end stage of parkinson s? [/INST] Hi, Thank you for posting your query. Phlegm and cough are not directly related to Parkinson's disease (PD). These symptoms are suggestive of respiratory tract infection, and would subside with antibiotics. There is no need to worry, and your father would improve well. He would benefit from breathing exercises. Please get back if you require any additional information. Best wishes, Chat Doctor. Ly/ </s>