May increase sedation w/ CNS depressants eg, benzodiazepines, opioids, alcohol. May increase BP w/ psychostimulants (eg, amphetamines, methylphenidate, modafinil, armodafinil) & MAOIs (eg, tranylcypromine, selegiline, phenelzine). Increased AUC
∞ w/ oral ticlopidine (CYP2B6 inhibitor). Increased mean C
max & AUC
∞ w/ oral clarithromycin (CYP3A4 inhibitor). Decreased mean C
max & AUC
∞ w/ oral rifampicin (CYP3A4 & CYP2B6 inducer). Minor pharmacokinetic effects w/ other nasal spray products (eg, oxymetazoline & mometasone furoate). Reduced mean plasma AUC
∞ of oral midazolam (CYP3A4 substrate).