Son used pharmacy brand saline nasal spray.65% sodium chloride phenylcarbinol:benzalkonium chloride moisturizing spray. he sprayed up nostril and it went down his throat. any dangers? thinking no but want to check?

No: The nasal spray going down the throat will not do harm. However, the nasal spray is not doing any good. You can make a salt solution at home, if you must rinse your nose. Have a healthy diet, exercise 30 minutes/day, drink plenty of water daily so your urine is mostly colorless, have safe sex, no tobacco alcohol weed or street drugs. For nutrition: http://www.choosemyplate.gov/.