Role of Antihistaminic in Acute Renal Colic Prevent Pain Recurrence and Expulsion of Ureteric Stone ≤ 1cm

Urolithiasis is one of the most common urological diseases. The risk of stone disease ranges between 5% and 12% worldwide. Ureteric stones account for ≈20% of all urinary tract stones and \>70% of the ureteric stones are located in the lower third of the ureter, i.e., distal ureteric stones (DUS). The colicky-type pain in the ureter, an increase in proximal peristalsis through activation of intrinsic ureteral pacemakers may contribute to the perception of pain. Muscle spasm increased proximal peristalsis, local inflammation, irritation, and oedema at the site of obstruction may contribute to the development of pain through chemoreceptor activation and stretching of submucosal free nerve endings. α-adrenergic blockers, anti-inflammatory drugs, antihistaminic and calcium channel blockers, which have a relaxant effect on the ureteric smooth musculature. The presence of histamine receptors in the ureter have been presented in various studies. The histamine-1 (H1) receptors have been shown to have a wide distribution Histamine, which is secreted from the mast cells, causes strong peristaltic contractions in the ureter. alpha adrenoreceptor antagonists (i.e., tamsulosin) have been employed in the treatment of ureteric colic due to smooth muscle relaxation so their potential ability to increase stone passage, reduce pain medication use and reduce urologic interventions. According to the currently accepted view, renal colic management starts with NSAI drugs also NSAI has role in decrease inflammation and oedema and increase expulsion rate . in this study we will compare the use of alpha blocker versus alpha blocker and antihistaminic in management of acute renal colic prevent pain recurrence and increase expulsion rate of ureteric stone ≤ 1cm, with analgesic use in case of acute stage.