Two painkillers a week increase the risk of hearing damage. This is apparent from recent American research.
Although the chance of a hearing impairment is only one percent, care should be taken when using paracetamol or ibuprofen excessively † The study, conducted on 27,000 American men, showed that painkillers from affected hearing impairment on later age.
Taking a painkiller twice a week was found to cause hearing problems in a third to more of the men. Men who didn't had fewer problems. According to the researchers, this doesn't hold us back to use painkillers, but so in moderation †