Welcome to OCF! Take a deep breath....we will help you! Your posts are a bit hard to read, all running together like one very long sentence. That may be why you have not had many responses. Another reason is that this isnt something I have every heard of on this forum. Never has anyone said the doc is ok with a big chunk of their tongue just falling off. Thats nuts!!!!!
I am very very sorry your poor father is going thru this. Is he being seen at a cancer center? No matter what the answer to that is, get him to another one! I will post a link for you. He needs a whole team of top notch doctors acting together to discus his individual case. A visual exam and saying its ok to lose a large piece of his tongue isnt right!
Pain meds can definetly mess with a persons mind. He is taking something pretty strong and Im pretty sure its a narcotic. Some narcotics can cause some bizarre behavior side effects. Ask for something else...liquid of course. Your dad has a peg tube right? Make sure he is getting proper nutrition so he heals. He has been thru alot and its hard to bounce back sometimes. Ive had OC 3 times within 3 years and every surgery I have is harder and harder to recover from. So please keep an eye on his nutrition so he will recover quicker. Make sure he is getting alot of protein and 2500+ calories daily, 48+ oz water daily.
I hope you find a good qualified doctor and cancer center from the list. Make sure when you call tell them your dad is a 2x oral cancer patient and is having a problem. Tell them he needs to be seen right away as you fear it is a recurrence again.
Best of luck with everything!!!
http://www.oralcancerfoundation.org/resources/cancer_centers.htmhttp://health.usnews.com/best-hospitals