Eyebrows feel heavy. I feel a light headache and fatigued. Is this normal?

The heaviness that you mentioned occurs occasionally after Botox but often resolves over the first few weeks.  The fatigue is not a common symptom after Botox/Dysport and is likely unrelated to treatment.  Your final results from treatment are seen two weeks after injection.

It is not unusual for the eyebrows to feel heavy after a Dysport treatment to the forehead.  This feeling normally improves within a week or so.  While there are several potential temporary side effects with Dysport, I have not had any patients tell me they were fatigued after the treatment.  

Hello. Thank you for your question. You may feel slight heaviness and tightness while it is kicking in. But you need to wait the full 2 weeks for your results.