The effects of any drug (including tobacco) vary from person to person.
How tobacco affects a person depends on many things including their size, weight and health, also whether the person is used to taking it.
Passive smoking can irritate the eyes and nose and cause a number of health problems such as heart disease and lung cancer.
Tobacco smoke is especially harmful to babies and young children.
Check with your health professional if you are taking or planning to take any drugs during pregnancy, or while breastfeeding.
People who use tobacco regularly tend to develop a tolerance to the effects of nicotine.
In 2004–2005 approximately three-quarters of a million hospital bed-days were a result of tobacco use.
(Collins & Lapsley, 2008) There is no safe level of tobacco use.
Many drugs can cross the placenta and affect an unborn child.
In general, using drugs when pregnant can increase the chances of going into labour early.