tamsulosin + paroxetine

**Tamsulosin + paroxetine** is an oral combination of two small molecule drugs: tamsulosin, an alpha-1 adrenergic receptor antagonist used primarily for benign prostatic hyperplasia (BPH) and lower urinary tract symptoms (LUTS), and paroxetine, a selective serotonin reuptake inhibitor (SSRI) most commonly prescribed for depression and anxiety disorders. Co-administration is not approved as a fixed-dose combination but is sometimes explored for certain off-label indications, such as premature ejaculation, where both agents may act synergistically. Paroxetine acts as a potent CYP2D6 inhibitor, which significantly increases plasma concentrations of tamsulosin via metabolic inhibition. This combination can moderately increase the risk of adverse effects (notably dizziness, hypotension, and orthostatic intolerance), though most reviewed studies observed no severe hemodynamic changes in healthy volunteers. Combined use may provide improved efficacy in select patients with premature ejaculation compared to monotherapy.