Dhaka, Feb. 29 -- An ear, nose, and throat specialist from Los Angeles, Dr. Marilene Wand, spoke about one of her patients. She suffers from nasal congestion during allergy season. For relief, the patient started on a non-prescription decongestant nasal spray.

It worked great initially and alleviated her symptoms. As she continued using it during the summer, her congestion worsened. It was only controlled by larger and larger doses of the medication, and the nose was fully blocked between sprays. So, she came to her doctor.

Dr. Kelly Erdos, a clinical pharmacist from Arizona, cautioned that patients could develop rebound phenomena due to overuse of nasal sprays, as happened with the patient of Dr. Wang.

Nasal sprays directly deliver dr...