What about altitude sickness?
Anyone, even the fittest, can be affected by altitude sickness above about 2700m. The symptoms are shortness of breath, headaches, lethargy and possibly diarrhoea and sickness. At 4000 metres (the height of Toubkal) the symptoms are not severe and usually last no longer than 24 hours. In severe cases it can prevent the sufferer continuing with the trek. Most of our treks are designed to mitigate the effects of altitude sickness by gradual ascent and acclimatisation over several days. Most trekkers, however, are fine, but it is a wise precaution to bring with you a supply of headache, re-hydration and anti-diarrhoeal tablets.