I will start my 4th cycle of Dacogen a week from this writing. Until now my side effects have been minimal. An occasional light head ache and a slight bit of nausea. However these last few days I am having more side effects and they are more severe. The effects I have now include moderate dizziness and nausea, trouble sleeping, headaches (some severe), numbness in the feet, and hypertension as high as 180/100. No problems with vision or speech.