Our nano-pumps have been designed specifically to ensure that you receive a consistent quantity of treatment with each pump action - so you should always have plenty of medicine to get you through the month. However if you do run out, please contact us and we will review your prescription and dispatch your next month's treatment to arrive with you the next day (excluding Saturdays). Please remember that using more than your prescribed dose of treatment won't improve your skin any faster, but could have harmful effects - always use as directed.