role of allopurinol and angiotensin receptor blockers in serum uric acid reduction in gouty and hypertensive patients

ABSTRACT

To evaluate the effect of Allopurinol in combination with angiotensin receptor blockers on hyperuricemia in gouty and hypertensive patients. Randomized, open label, prospective, comparative trial. This study was conducted in the Department of Pharmacology and Therapeutics; BMSI/JPMC, Karachi from April 2010 to November 2010. 80 hypertensive and hyperuricemic patients were enrolled from OPD and medical wards and were divided into two groups. Group DR-1[40 Patients] were given allopurinol 300mg plus candisartan 8mg daily and group DR-2 [40 patients] were given allopurinol 200mg Plus Losartan 50mg, daily four 4 months. 6 patients were unable to continue the follow-up 3 patients in each group. DR-1 combination therapy decreased serum uric acid level from 8.92 +/- 0.19mg/dl at day 0 to 5.33 +/- 0.11 mg/dl at day120. DR-2 group also showed a significant reduction in serum uric acid level from 9.14 +/- 0.19mg/dl at day 0 to 4.74 +/- 0.09mg/dl at day 120 [p<0.001]. When effects were compared in both treatment groups, the effect of group 2 regimens on serum uric acid level was more marked due to Losartan combination which also have uricosuric effects than in group 1 regimen, with average percentage decrease in serum uric acid - 40.35% in group DR-1 and -48.24% in group DR-2. The allopurinol 200mg and Losartan 50mg is more effective than allopurinol 300mg+ candesartan 8mg, to decrease serum uric acid level and group DR-2 drugs combination useful in those hyperuricemic patients who cannot tolerate high doses of uric acid lowering drugschromatogram obtained indicated the quantity of pesticide residues. Milk samples and serum samples were analyzed using HPLC technique. Pesticides such as malathion, permethrin, deltamethrin and Polytrin-C were detected in different concentrations. The levels were significantly higher than the maximum residual limit. It is concluded that the presence of pesticides in the human body is a major concern in the development of various ailments because of possible immunotoxic, mutagenic and carcinogenic potential of pesticides