Nicorette Inhaler Refills delivers 4 milligrams of nicotine that lasts about 20 minutes of frequent puffing. Nicorette may help you stop smoking by alleviating the discomfort of cravings and withdrawal symptoms. Each Feel confident in your quit attempt with this smoking cessation aid. This product comes with 42 cartridges.Only to be used by adults who are trying to quit smoking. WARNING: This product contains nicotine. Nicotine is highly addictive.