A list of cons is easy to find. This is provided by Nicorette and applies to nicotine: inhalation aerosol liquid, inhalation aerosol powder, inhalation device.
Along with its needed effects, nicotine (the active ingredient contained in Nicorette) may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.
Check with your doctor immediately if any of the following side effects occur while taking nicotine:
Less common
Fast or irregular heartbeat
fever with or without chills
headache
nausea with or without vomiting
runny nose
shortness of breath, tightness in the chest, trouble with breathing, or wheezing
skin rash, itching, or hives
tearing of the eyes
Get emergency help immediately if any of the following symptoms of overdose occur while taking nicotine:
Symptoms of overdose
Abdominal or stomach pain
cold sweat
confusion
convulsions (seizures)
disturbed hearing and vision
drooling
extreme exhaustion
pale skin
slow heartbeat
tremors
Some side effects of nicotine may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:
More common
Acid or sour stomach
belching
coughing
heartburn
indigestion
mouth and throat irritation
stomach discomfort, upset, or pain
stuffy nose
Less common
Anxiety
back pain
change in taste
........
dizziness
feeling of burning, numbness, tightness, tingling, warmth, or heat
feelings of drug dependence
flu-like symptoms
general pain
hiccups
mental depression
pain in the jaw and neck
pain in the muscles
passing of gas
problems with teeth
trouble with sleeping
unusual tiredness or weakness