Yes, it is generally safe for someone taking an antibiotic for bronchitis to also take a cough syrup like Benylin or an antitussive like Ulone. For a dry cough, Ulone syrup can be used multiple times a day along with throat lozenges. If the cough is more productive, it may be better to stick with just throat lozenges and stay hydrated to help loosen and clear mucus. Different types of Benylin syrup are available, so it would be best to choose one that is appropriate for the specific type of cough. It is always a good idea to consult with a pharmacist or healthcare provider for personalized advice.