Use with caution in

• Adolescents aged 12 to 18 years old. (If you are in this age group you should not use NRT for longer than 12 weeks without consulting a doctor, pharmacist or nurse for advice.)
• Disease involving the heart and blood vessels (cardiovascular disease) . (Using NRT is much less hazardous than continuing to smoke. However, if you are in hospital because you have recently had a heart attack or stroke or you have severe irregular heart beats, you should ideally try to stop smoking without using NRT. Seek advice from your doctor.)
• Diabetes . (Monitor your blood sugar more closely when starting NRT.)
• Overactive thyroid gland (hyperthyroidism) .
• Tumour of the adrenal gland (phaeochromocytoma).
• Severely decreased kidney function.
• Moderate to severely decreased liver function.
• Eczema or other skin diseases.