There are various OTC saline-type nasal gels one can use, but the
pharmacist told me that the best thing is plain old K-Y Jelly, because it's non-allergenic, non-irritating, and cheap. Some docs recommend heavier ointments, and among them, a topical nasal antibiotic called Mupirocin or Bactroban is remarkably effective in preventing bleeding. However, since it's an antibiotic, doctors don't want to prescribe it for long-term use.