A bit of background:
My father, who is almost 59 yrs old, has been a heavy smoker/drinker since past 35 years or so until the last 2 months when he finally decided to call it quits. Well, he had to as he fell ill (we believe directly or indirectly due to smoking/drinking that caused compromised immune system) and went into a septic shock and had to be rushed to the hospital due to low BP (60-35). His kidneys had stopped functioning, his liver got affected and also his heart as the doctor said after they did the echo test. Luckily, he made it through all this and was finally discharged after about 2 weeks in the hospital where he was administered a heavy dose of antibiotics intravenously to treat his pneumonitis in the left lung. His kidneys had revived after 3 days and the liver also started functioning well and so did the heart as we were told.
While he was discharged, he felt great and he swore that he wont ever smoke or drink! Its been 2.5 months and he has kept his promise and during this time, he had to go through a tough time where he was irritated, short tempered, had sleepless nights and bore all effects that smoking/drinking withdrawal brings along. We wish he had done this long back but nevertheless, we cant be more thankful to God. He has a healthy routine now and has never felt emotionally better in life.
When he was discharged from the hospital, he left with a sore throat and a slurred voice and was barely able to speak. The doctors discharged him with followup medication which included few medicines, a nebuliser, nasal drops etc. He also had severe ulcers in the mouth and he found it difficult to eat anything but managed to somehow after application of some numbing ointment in the mouth.
Its been 2.5 months since then and after few more antibiotic treatments with other doctors the ulcers have gone but the throat is still sore and it has started to pain with difficulty swallowing (as if something is stuck in the neck). His voice has improved a lot but still not what it used to be and is still a bit hoarse.
Can anybody suggest, what could be wrong? Can antibiotics used to treat pneumonitis cause this? His appetite has increased considerably since he left smoking/drinking (touch wood) and his weight has started to increase for the first time in his life now.
Please share your thoughts. I hope 35 years of smoking has not caused some irreparable damage to his throat. The doctors have suggested him a CT of the throat and biopsy of the tissue.