Rush Limbaugh had or has a drug problem.
Rush Limbaugh lost his hearing and has cochlear implants.
Rush Limbaugh has fans and detractors.
These are the facts.
And while it is possible that his drug abuse caused his hearing loss, it is also possible that something else did. I have been a nurse for 25 years, have taken care of many drug detoxing patients...detoxing from all sorts of drugs...and have never had one who had a sudden hearing loss. And frankly, most of these folks were in a lot worse shape than Rush Limbaugh has ever been in in his life. I am talking hard-core drug addicts here folks...sleeping on the street, sharing needles and so forth.
As Cool-Beans said, since I do not have access to his medical record, I have no basis on which to come to the conclusion that his hearing loss was caused by drug addiction. I can make that assumption, I can even put it out there as a possibility, but to state it as fact...sorry, no can do.
FTR, I can't stand Rush Limbaugh, but I have seen havoc wreaked on people's lives when we "assume" stuff about their medical/health care. So I don't assume anything.