Most people thinking of trying out nootropic supplements usually ask whether or not it is safe to use. Of course, the answer to this is that yes. This is on the condition that the supplement is used in the way that it should be.
Now, when it comes to the issue of side-effects, it is perfectly normal to experience them. In particular, headaches are a common occurrence when you start using nootropics. However, they will go away naturally, in time.
Keep in mind that all substances, when taken in excess, can be potentially dangerous.