After doing some quick research, all I could find is that some anthistamines ( the H-1 antagonists , like the ones we're mentionning here for insomnia ) have some antagonist action at the alpha-1 adrenergic receptors. Now, being antagonists doesn't necessarily imply that upregulation of those receptors will follow, does it ? Anyone can confirm or deny this ?
I'd really love to get to the heart of this issue, because if it's true, it could explain a lot of things in my case. I've been using antihistamines almost daily for years to this day for my insomnia, and concurently during these years I've constantly failed to find something that gets my chronic anxiety under control ( outside of benzos ). Could it be because of all these years of almost daily upregulation of adrenergic receptors....
Obviously this is anecdotal, but considering the context and considering my prior experience.....well you can come to your own conclusion.
http://forums.steroi...works-clen.htmlThese are bodybuilders, and as we all know they are serious about their stuff lol.
"These are the oldest H
1-antihistaminergic drugs and are relatively inexpensive and widely available. They are effective in the relief of allergic symptoms, but are typically moderately to highly potent muscarinic
acetylcholine receptor (
anticholinergic) antagonists as well. These agents also commonly have action at α-
adrenergic receptors and/or
5-HT receptors. This lack of receptor selectivity is the basis of the poor tolerability profile of some of these agents, especially compared with the second-generation H
1-antihistamines. Patient response and occurrence of adverse drug reactions vary greatly between classes and between agents within classes." Thats from wiki, obviously its very ambiguous offering no specifics whatsoever.
"Cationic ampiphylic drugs are known for their ability to inhibit phospholipase A2. Benadryl (diphenhydramine) is a cationic ampiphylic drug.
Ergo, Benadryl slows desensitization of Beta receptors (i.e. Upgrades them) by inhibiting phospholipase A2, which is the enzyme that breaks down methylated phospholipids, and this action in turn keeps the phospholipid membrane stable, and thus keeps the receptors functioning properly. (7). This will allow you to use clen for much longer and it´ll still have the same effects. Also, since Benadryl is an anti-histamine, and histamines have a direct effect on beta-adrenoreceptors (not just Beta-2´s but all of them), using an anti-histamine will have a direct effect on reducing beta-receptor stimulation (16), and thus upregulating your beta-receptors." Another bodybuilder site that doesn't reference statement
BEST THING I FOUND SO FAR
"You must remember that benadryl has anticholinergic properties. It can block the binding of Ach to M2 receptors found in the heart. This would most likely increase the heart rate, which would be detrementalfor a person recently diagnosed with CHF. In addition to this, there could be a drug drug interaction with beta blockers, which are commonly prescribed after a MI.
Beta receptors are embedded in the cell's outer phospholipid membrane. The stability of the membrane has a lot to do with the functionality of the receptors. It turns out that methylation of the phospholipids is stimulated by the binding of beta agonists to their receptors. The body recognizes these methylated phospholipids as foreign, and breaks them down with an enzyme called phospholipase A2. This alters the structure of the outer membrane and results in desensitizaton of the beta receptors (1). Conversely, agents that inhibit phospholipase A2 slow desensitization.
It turns out that cationic ampiphylic drugs are well known for their ability to inhibit phospholipase A2. Ketotifen is a cationic ampiphylic drug, so is diphenhydramine (Benadryl)
Max
(1) Prog Clin Biol Res. 1981;63:383-8.
Phospholipid methylation: a possible mechanism of signal transduction across biomembranes.
Hirata F, Tallman JF, Henneberry RC, Mallorga P, Strittmatter WJ, Axelrod J
http://forums.studen...p/t-244952.html"
I know many poo poo on anecdotal evidence, I don't when it is reported in large quantities, especially as concerns bodybuilding since there is an actual visibly noticeable effects. If benedryl didn't upregulate beta receptors so some degree the clenbuterol wouldn't work for cutting. All anecdotal reports I have come across so far say that it isn't as effective as ketotifen, which naturally shouldn't suprise us. The last report I posted links benedryl to high blood pressure, something I noticed the morning after using benedryl along with agitation and increased urination.
Sorry if this isn't good enough. I hope the last post is.
As far as your insomnia is concerned have you tried Hesperidin?
Here is a cheap source, for horses, but it is a large quantity for less than buying encapsulated.
http://www.cheshireh...wder-P3090.aspx
Edited by extroverinstinct, 26 October 2013 - 07:44 AM.