I just had a revision a month ago and my neurosurgeon replaced my fixed VP shunt with a Codman Haskim (sp?) programmable shunt. I had the setting changed 2 weeks ago and now it's draining too much supposedly and causing my headaches and constant tiredness. So, I go back tomorrow to get the setting changed. I was off work 2 weeks after my surgery then talked the dr into going back to work last week. Big mistake!! I have an office job but my mind just wasn't all there yet. I was super forgetful and my thinking was slower. I honestly think this Texas heat is not helping either. It's just been miserable. Normally, i'm constantly on the go and busy but I've been draggy. I want to take more time off to actually take it slow and heal up right but not sure if my dr will approve it. I did so well the last 25 years with the fixed shunt. I hope this programmable one was a good idea.