It's not normal to feel tired for weeks on end if you're sleeping enough. Have you considered that you may be tired because of medicine you take?
Speak to your or pharmacist about the side effects of any medication you have to take long term – a different blood pressure medicine, painkiller or sleeping tablet may not tire you as much; do not take medicine containing stimulants in the evening (e.g. herbal remedies containing guarana, pseudo-ephedrine or ginseng); read the information leaflet inside the packaging carefully to find out if the medicine can tire or stimulate you – avoid over-the-counter medication that causes fatigue.
[This tip was originally published in the Spring 2007 edition of YOU Pulse / Huisgenoot-Pols magazine. The summer 2007/8 edition is on sale now.]