Use of the nasal spray requires a prescription from you doctor, so you will have to wait until you have seen your doctor before you can begin using it. The cost will depend on your health care coverage. The most common side effects from the nasal spray are irritation of the nose and throat, watering eyes, sneezing and cough. These side effects are usually short-lived and are more tolerable after the first week. A sore throat is also a common withdrawal symptom. Gargling with warm salt water may help. People may be more likely to become dependent on the spray than other NRTs because the nicotine is absorbed so quickly.
For more information, see: http://www.nlm.nih.gov/medlineplus/druginfo/meds/a606020.html