I went back over the literature again to confirm that there is no
evidence I could find to suggest that allopurinol has any affect on
uric acid that has already formed in your body. The mechanism of
action of allopurinol is to stop the formation of new uric acid.
While reading various references, I ran across several very recent
references that are very important to us.
Earlier medical literature has noted the relationship between gout
sufferers and hypertension-(high blood pressure) as well as a
similar correlation with corronary heart disease. Until very
recently this was thought to be a co-effect of gout, perhaps, it has
been suggested, that gout and hypertension are caused by the same, or
at least similar, metabolic conditions.
I would suggest that you read at least the first reference I will
give because it is a startling result.
1) http://www.rheumatology.hss.edu/phys/specialReports/uricAcid.asp
(July 1, 2003) Theodore R. Fields, MD, FACP
Internet Project Director, HSS Division of Rheumatology
Director, HSS Rheumatology Faculty Practice Plan
Associate Professor of Clinical Medicine, Weill Medical College of
Cornell University
Uric Acid and Cardiovascular Disease - Chicken or the Egg? New Animal
Data Suggest Possible Pathogenic Role of Urate.
2) Hypertension. 2003 Jun;41(6):1183-90. Johnson RJ, Kang DH, Feig D,
Kivlighn S, Kanellis J, Watanabe S, Tuttle KR, Rodriguez-Iturbe B,
Herrera-Acosta J, Mazzali M:
Is there a pathogenetic role for uric Acid in hypertension and
cardiovascular and renal disease?
3) Hypertension. 2000 Dec;36(6):1072-8. Verdecchia P, Schillaci G,
Reboldi G, Santeusanio F, Porcellati C, Brunetti P.
Relation between serum uric acid and risk of cardiovascular disease
in essential hypertension. The PIUMA study.
4) Hypertension. 2001 Nov;38(5):1101-6. Mazzali M, Hughes J, Kim YG,
Jefferson JA, Kang DH, Gordon KL, Lan HY, Kivlighn S, Johnson RJ.
Elevated uric acid increases blood pressure in the rat by a novel
crystal-independent mechanism.
In order to keep from upsetting anyone as to why I say these things,
I will quote from the first reference cited here.
Dr. Fields writes:
"Recent animal studies, however, suggest an independent risk status
of urate.3 Rat data in this study suggested that urate appears to be
pathogenic of hypertension, arteriolar wall thickening, and
endothelial dysfunction. Mild induced hyperuricemia (using a uricase
inhibitor which does not lead to crystal deposition in the kidney and
preserves renal function) causes hypertension in the rat within
several weeks, with stimulation of the renin-angiotensin system and
inhibition of NO synthase (and renal injury and fibrosis).
In this model, blood pressure changes were prevented if allopurinol
was given early. Chronically hyperuricemic rats showed salt-
sensitivity and thickening of the afferent artery of the glomerulus
and tubulointerstitial inflammation and fibrosis - which did not
reverse if allopurinol was given late. Hyperuricemia stimulated rat
vascular smooth muscle cell proliferation and induced endothelial
dysfunction."
That may be hard to absorb but the bottom line is that when they
artifically induce high urate levels in rats, those rats develop high
blood pressure and they develop hardening and thickening of the
arteries. More importantly, when those rate were fed allopurinol
early in the test, the hypertension symptoms did not appear. If the
symptoms were allowed to go too long, they were not reversible.
The excess uric acid that we are accumulating from our gout condition
is much more dangerous than just the pain we feel from the attacks.
The high levels of urate in our blood is causing severe and
eventually non-reversible cardio-vascular problems.
Based on this finding I plan to get my physician to increase my
dosage of allopurinol to a level known to stop urate production
altogether and then titrate my system back to the optimum level. That
is, I will move the dosage level down, slowly, based on any bad
reaction to the drug, based on serum urate levels in the blood and
based on how my gout attacks are progressing.
Some of you have stated your reservations about taking allopurinol,
as I did, but allopurinol is indicated for gout sufferers and to my
way of looking at it, this is cardio-vascular implication is the most
persuasive of all the information I have read. I can live a long time
with a pain in my foot, I cannot live very long if my heart and my
arterial system are compromized.