Special care should be taken if the patient has/is: Pregnant or breast-feeding.
High blood pressure.
Liver, kidney or lung disease.
Hyperthyroidism (where the body makes too much thyroid hormone).
Nervous system problems.
Raised temperature.
Stomach ulcer.
Hiatus hernia (this occurs in the upper part of the stomach).
Diarrhoea, gastroenteritis or any other infection of the gut.