If you have cold or flu, you should wait six weeks before going in for the anaesthetic; if you're a smoker, it's best to stop smoking three months before undergoing surgery; your asthma should be fully controlled; if you've had a heart attack, it's best to postpone surgery for three months; if you have heart failure, it's essential that you be treated before surgery; if you're diabetic, your blood sugar should be under tight control; and if you're on chronic medication, especially for conditions such as hypertension, it's essential that you continue your medications right up to the day of surgery.
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