I take cipralex 10mg once a day and since then I feel twice as tired as usual, is this an effect of the medication?

Hello,

Cipralex can indeed have a side effect of fatigue. However, this effect is usually temporary (a few weeks with gradual improvement) at the beginning and after dose increases.

Another thing you can do, if you take it in the morning, is to take it at bedtime. I hope I have answered your question.