Do they metabolize faster or slower? I would say you may be a good candidate for 3 doses a night if its fast, and staying at a lower dose if it slower.
From what I understand Xyrem metabolizes at the same rate regardless of the dose. Also regardless of body mass. And we need 6 hours from the last dose before it is safe to drive.
I have been trying to find information about 3 doses per night. First of all, Xyrem is only licensed for 2 doses per night. I have found some references to 3 doses in some children but no details. It seems to infer that children need a longer period of sleep each night because their bodies are growing.
But I have found no peer reviewed (medical journal) studies on 3 doses.
My biggest concern about 3 small doses is that it would result in a long duration of lower quality sleep. I would be very happy with the fewest necessary hours of sleep with the highest quality I can achieve. Since the larger dose (like 9g/ 4.5g x2) achieves the highest quality deep sleep in the shortest period, that has been my goal. That is what I am on now and I am pleased with the results. If I can reduce that in the future, then I will be glad to reduce it.
The recommended timing for dose 2 is 2.5- 4 hours after dose 1. I have been going with 2.5 hrs. and that has worked better for me during the week.
I have always slept 7.5- 8 hrs per night. I never knew until my first PSG 5+ years ago that my sleep was so fragmented and inefficient. I had to wrap my head around the idea that duration of sleep and quality of sleep are 2 different matters. We need a balance of the right quality for the right duration to gain the full benefits of sleep.
I had been incorrectly diagnosed and treated with a medication that further decreased the qulaity of my sleep, but it did increase the duration. So, my neurologist kept telling me I was getting better. But the only definition of "better" was sleep duration- I did not see any results of being better, I was feeling worse.
When I went to a sleep medicine specialist, she essentially said he was wrong (actually she almost fell off her chair). So, I have learned the hard way that duration of sleep is a cheap substitute for quality. I feel plain stupid for believing a wrong diagnosis and taking a medication that stole so much from me (I'll stop there....dont't get me started!) My second PSG/ first MSLT clearly showed that decreased quality from the wrong medication. My third PSG/ 2nd MSLT (without that medication) finally showed my true baseline- and my diagnosis was made.
I will continue to evaluate my doctor, seek second opinions when I need, and educate myself on these things that I never knew. I suffered for not knowing, and I trusted a doctor who didn't know either.
Right now- the literature, the dose/schedule, and the direction of my doctor- all line up.