Can I take an inhalation with the antibiotic Klacid?

There is not, or at least I do not find a drug called "midlonide". You may be referring to Miflonide - inhalation powder in hard capsules: https://www.gdziepolek.pl/produkty/49055/miflonide-breezhaler-kapsulki/apteki/w-warszawie Miflonide is a prescription, so the possibility and need to use it if you are taking the antibiotic Klacid should be decided by a doctor who knows what is wrong with you. From a pharmaceutical point of view, there is no information that these drugs change each other's effects. If you have doubts whether you need an inhaled medicine at the moment, you can try to get such advice by teleconsultation: https://www.gdziepolek.pl/telekonsultacja I enclose additional information about Klacid - prescription drugs can be booked at GdziePoLek and collected stationary upon presentation of a prescription: https://www.gdziepolek.pl/produkty/40214/klacid-tabletki-powlekane/apteki/w-warszawie