High doses of steroids should not be taken over a long period of time, unless have specific conditions. They have horrible side effects . As a severe asthmatic, before I was put on a daily maintenance dose, I never took prednisone for more than 10 days. To go on a daily dose you need to see a hospital consultant, because a GP is not allowed to prescribe this. That's how careful you have to be with steroids. Anyway, the dose you have taken should have a lasting effect for some while without you taking any more. That's how they work with asthma. I agree about getting a phone appointment to ask for your prescription to be renewed, but if the doctor says no, I WOULD NOT PURCHASE THEM OVER THE INTERNET.