Hi DLL,Sorry your struggling with weird new symptoms.
My reply is much too long and have to warn you it is full of speculation.
I know exactly what you mean about a new symptom that is some kind of red flag. You just know that something is not quite right. All of us listen to our bodies.
I took 2 bottles of Mepron. The first bottle was pretty easy to take. The second a little tougher. I stopped and started a 3rd bottle many times, but it was beginning to cause new neuritis diagnosed by my LLMD of right lower leg/bone pain from below knee to top of foot.
Anyway, I just woke up with this severe bone pain. Believe me, I know pain quite well.
This was scary and different. Something was very wrong. I stopped my Mepron or I could not have traveled to Houston to see my LLMD. I wouldn't have made it.
It also began to trigger all my old pain sites in my head: left ear pain, forehead and back of head pain (meningitis type pain).
It was crying pain of the head and I had a complete meltdown------just so sick of the pain. And suddenly it was back. I told my husband there was no way I could make it to Houston in this shape. It was a very bad scene.
Mepron made me brain dead by the time I stopped taking it and caused some confusion a few times which freaked out my husband.
My LLMD told me to stop the Mepron as it can cause new neuritis. He told me Mepron goes to the brain. I had also told him I was Mean Mepron Mommy and basically brain dead trying to get down the 3rd bottle.
I have scanned the Physician's Desk Reference on Mepron. It does list insomnia as a side effect of the med which would indicate it goes to the nerves. No where does it say it crosses the blood brain barrier.
I called GlaxoSmith Kline at 1-888-825-5249 just now. I asked if Mepron passes the BBB.
The pharmacist had to stop & look this up herself.
She said this reading from insert:
Under heading of DISTRIBUTION: children receiving 750 mg 4 times daily for 2 weeks only had cerebrospinal fluid concentrations representing less than 1% of the plasma concentration.
This pharmacist said less than 1% in the CSF was not clinically relevant.
All I can figure out is that I was building up toxic levels in my bloodstream. Either I'm a slow metabolizer or my liver cannot metabolize Mepron out of the body as fast as it should be eliminated.
I just paid $25 for my medical records and they forgot to include the August Lab work. I wanted to see if anything was abnormal such as liver, kidney or pancreas------can't do that yet. (LLMD's practice is closed.)
The only thing I can speculate is because Mepron has a very long half-life, it has greater chance of toxicity in some patients.
Mepron half-life is 67.0 +/- 33.4 hours to 77.6 +/-23.1 hours.
From drug insert: It states the long half-life is due to presumed enterohepatic cycling.
It also states: "It is necessary to treat patients with severe hepatic impairment, caution is advised and administration should be closely monitored."
Years ago, my pain doctor told me it can sometimes take a long time for liver problems to show up on Liver Function Studies.
But in my amateur opinion, I would imagine it could show up rather quickly on a drug induced liver problem.
Some of the side effects reported during post-approval use of Mepron:
Pancreatitis and acute renal impairment.
If you happen to scan the PDR information, most of the research was primarily done on AIDS patients so while it's very helpful, to me the research is slightly skewed.
Here is the link which is in the PDR information or drug insert info Mepron:
http://www.drugs.com/PDR/Mepron_Suspension.html
As for me, my shortness of breath is gone and the red pin points (petechiae) on my upper body are fading, but not gone.
I probably do need more Mepron as I've had undiagnosed LD for 13+ years. First, I would need to detox my liver. I am not afraid to try Mepro again. As I said earlier, the first bottle is tolerable.
If you can scan that information, you will see Mepron can cause fever, asthenia (profound weakness), fever, abdominal pain, headache and of course, nausea, insomnia, itching (pruritus).
It caused me a weird depression-----can't explain it, but it's not listed as a side effect. Also, it killed my appetite----just gone.
I'm not even certain as to what happened with me on Mepron. So please realize this was my experience only. The rest is simply my opinion.
As Cave said the real experts are on the Mepron Buddies Redux thread and I think they've started a newer one, also.
Those who can stay on Mepron for months at a time (with a break between bottles) must be fast metabolizers or have really good livers.
But that's strictly me speculating.
I hope you and your doctor can figure out what's going on. Just because I became toxic on Mepron does not mean that you're toxic on Mepron.
That's the million dollar question with every med. Is it a herx, toxicity or allergic reaction?
I would definitely call my doctor, maybe he could let you lower dose or stop for 1 or 2 days.
But then again, the drug resistance problems is always a question, so that definitely would be something your LLMD would have to answer.
I'm sure you'll be fine and you'll find the answers, but keep listening to your body.
Take Care,
Jan
[This message has been edited by RECIPEGIRL (edited 01 November 2004).]