- The subject's anticipated use of orally inhaled steroid must be less than 4 weeks over a 6 month period; if nasally inhaled steroid use is anticipated, the subject agrees to use mometasone (Nasonex) only. Use of mometasone is not restricted (all other nasal steroids are prohibited); subjects may change to mometasone, but must have discontinued the previous nasal steroid for at least 30 days prior to randomization