Reading research symptoms and conditions

I have been reading research reports that show that montelukast (Singulair) has a higher pKa than many of the other quinoline malaria drugs. That means that Singulair ionizes more easily than even drugs that are known to cause terrible dreams, hallucinations, depression, anxiety, and suicidal thoughts. Many researchers believed that the problem with Vioxx was that it ionized under certain physiological conditions.

I will report again when I can confirm the numbers. I am not sure if it is confirmed that montelukast's pKa is around 5.8 and the malaria drugs is around 4.8. I need to do more work before I can point out that it is not impossible to theorize that montelukast ionizes like Vioxx.

I am starting a new post in the hopes that others will see what I am trying to say about the delayed reaction in those that took Singulair for allergies.

If it is consistent that Singulair does not stop allergy symptoms immediately, then the pathways that eventually stop allergy symptoms involve a change in the mast cell function, development and migration (or some combination).

I asked this question for a reason. Are allergy symptoms stopped immediatedly. My question below:

I have a question that will help me continuing looking for information. I can understand that in the case of asthma that Singulair would provide immediate relief. If it is used for seasonal allergies or other allergies without asthma, does it work right away or does it take a period of days or weeks to be effective? If it takes time, could you tell me how long it took in your situation?

My thinking was going in the right direction if the answer below is consistent of everyone or most.

about 2 hours ago on Apr 11, 2008 by catherineevans, #7045
My granddaughter was put on Singulair for allergy symptoms without asthma. Itching, red eyes, terrible congestion, etc. dark circles under her eyes all the time. When we first put her on this, we didn't see any consistent results for 2-3 weeks, then it seemed to 'kick in.' I don't know if this helps. By the way, she was 9, now she's almost 12 and was immediately taken off when this story came out 2 weeks ago.

Then after seeing one response, I gave my reason for asking.

I asked this question because I have a theory of how montelukast really works for allergies as compared to how it works for asthma.

Asthma is a hyper-sensitive state that gets going because the mast cell has a receptor (the leukotriene receptor that Singulair blocks) that sends a signal along a pathway that causes lung tissue to have that extreme response - the wheezing, the airway constriction.

On the mast cell is another receptor the histamine receptor that causes the secretions that make our noses runs and and stuff up. This is not the same immune response as the asthma response. When I saw a post that somebody's doctor said that Singulair is an anti-histamine, NO it is NOT.

So if Singulair does not block histamine immediately and your child's allergies did not go away immediately, then maybe Singulair is working through some other means such as changing normal mast cell homeostasis.
I know that this seems like "what does this mean?" I am really writing this hoping to God that there are people reading this site that know what I am talking about.

Thank you so much for responding. Your answer actually told me what I wanted to know and confirmed my hypothesis. More answers will help. I hope others respond.

PLEASE respond about the length of time that allergies disappeared if you took Singulair for allergies.

Very few side effects. My father was put on 30 mg of Prednisone to control an inflammation that he was having in his body. It seemed to work well. He had also lost considerable weight, had anemia and was admitted to the hospital prior. So I wasn't worried about the common side effect of Prednisone of weight gain, as post-hospital we were glad he was gaining weight. I don't know if it was a side effect, as he only slowly gained a pound or two each week and then eventually plateaued about about his old weight.

We've now started tapering it, at my recommendation, not the doctor's!, and we are not seeing any return of side effects yet. He did have a bit of the puffy face, and is a bit compulsive, but we don't know if that's because of his Alzheimer's or the Prednisone.

I wanted to let some other know, as I've done a lot of reading/research, looking at the prescribing and pharmakinetics of the drug, it seems important that the taper is most critical when you are nearing 5 mg. This is because 5 mg is about the amount that your body naturally makes, so if your adrenal glands have stopped making it, it would take some time for them to 're-awaken'.

Therefore, the typical recommended tapering schedule is something like 10 mg per week, then slowing it down at 10 mg, and then real slow at 5 mg, eventually going to like 1 mg pills, as you try to continue down to no pills.

While I think Prednisone did put an end to a life-threatening inflammation for my father, I like many others would have liked much more upfront info and options from the docs. We are now on a slow 3 month taper schedule, that nobody realized we'd have to do when we started.

BTW, my dad has mild/moderate swelling in his ankles and toes, but nothing in his hands or abdomen. We don't know if it's because of his loss of weight, muscle and weakening of his heart, and/or some interference with his adrenal-regulation from an ACE inhibitor, Lisinopril, that he is on for his hypertension, or the Prednisone.

Any advice on the swollen ankles would be appreciated.