What is the ruling on a doctor taking 40% of the profits of hearing aid engineers—in addition to their original profit—in exchange for them selling hearing aids to patients, and what is the ruling on working in a center that accepts this commission, knowing that the doctor waives his share only?

The questioner did well by abandoning these funds and deducting them for the patient, because this method demeans the physician's profession and transforms it into a trade, and it is a pretext for deceiving patients and unlawfully consuming their wealth, as the patient is the one who pays the commission. As for working in the aforementioned place, its impermissibility is not decreed as long as the questioner does not take any of the percentage for himself and offers sincere advice. However, if he finds another place free from such practices, it would be more fitting and further removed from doubt.