Welcome to Just Answer and thanks for your question. Drixoral was a combination of dexbrompheniramine (an allergy medication) and pseudoephedrine (a decongestant). The problem with taking pseudoephrine is that it increases blood pressure. Dexbrompheniramine and pseudoephedrine may still be available as the names and suppliers below. You can ask your pharmacist to order it if they don't stock it.
The doctor must have found impacted wax in her ears. The drops are to soften the wax so it can be washed out when they are flushed.