The nicotine patch releases a constant amount of nicotine in the body; the nicotine dissolves right through the skin and enters the body. The patches are similar to adhesive bandages and are available in different shapes and sizes. A larger patch delivers more nicotine through the skin.
Nicotine gum contains enough nicotine to reduce the urge to smoke. The over-the- counter gum is available in the same strength as the original prescription product, 2mg (for smokers of 24 or fewer cigarettes each day) and 4mg (for smokers of 25 or more cigarettes each day).
Nicotine nasal spray, dispensed from a pump bottle, relieves cravings for a cigarette. It delivers nicotine to the nasal membranes and reaches the bloodstream faster than any other NRT products.
The nicotine inhaler consists of a plastic cylinder containing a cartridge that delivers nicotine when you puff on it. Although similar in appearance to a cigarette, the inhaler delivers nicotine into the mouth, not the lung, and enters the body much more slowly than the nicotine in cigarettes.
A non-nicotine pill, bupropion hydrochloride (Zyban) was approved in 1997 to help smokers quit. The drug is also sold as an antidepressant under the name Wellbutrin.
The newest prescription drug Varenicline tartrate, also known as "Chantix", is the second nicotine-free smoking cessation drug available.
The nicotine lozenge comes in the form of a hard candy, and releases nicotine as it slowly dissolves in the mouth. The lozenge is available in 2mg or 4mg doses. One lozenge is one dose, and maximum dosage should not exceed 20 lozenges per day.