Most people who take Norvasc (amlodipine) for blood pressure treatment experience no side effects at all. Norvasc is usually taken as either a 5mg tablet or a 10mg tablet. Side effects are more common with the 10mg tablet. Here are the commonest Norvasc side effects:

* Swollen ankles - swollen ankles are five times more likely on those taking 5mg of Norvasc and nearly twenty times more likely on those taking Norvasc 10mg per day.

* Dizziness - feeling dizzy is twice as likely if you are taking Norvasc 5mg but the incidence of dizziness does not increase if you are taking the 10mg tablets.

* Palpitations - palpititations are three times more likely if you are taking 5mg of Norvasc and nine times more likely if you are taking Norvasc 10mg.

* Flushing - flushed feelings or sweating is twice as common if you are taking Norvasc 5mg and three times more common if you are taking Norvasc 10mg.

* Fatigue - fatigue is a very common reaction in those taking Norvasc and most studies suggest that it can affect up to one in ten of those who take the drug - even at the 5mg tablet dose.