Introduction: The human ureter contains a high number of α-adrenergic receptors, especially α1d -receptors at the lower part of the ureter. Tamsulosin is a combined α1a-and α1d-selective adrenergic antagonist that is an alternative to other medications, such as calcium channel blockers, corticosteroids, and analgesic and anti-inflammatory drugs, for the treatment of distal ureteric stones.
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