Terazosin hydrochloride (Hytrin) , a selective alpha1-antagonist, can treat the benign prostatic hyperplasia (BPH). It also can lower blood pressure, so it is a drug of choice for patients with prostate enlargement and hypertension. It works on the smooth muscle of the bladder and the blood vessel walls by blocking the function of adrenaline.

Terazosin 可诱导 PC-3 和人类良性前列腺细胞产生细胞毒性，IC50 超过 100 μM。Terazosin 还能有效抑制血管内皮生长因子诱导的人脐静脉内皮细胞增殖和管形成（IC50 分别为 9.9 和 6.8 μM）[3]。

Terazosin 能产生剂量依赖性的完全抑制运动活动和催眠作用。脑室内注射这种拮抗剂可保护纹状体和大脑皮质α1受体，但不能保护纹状体或大脑皮质D1受体免受N-乙氧羰基-2-乙氧基-1,2-二羟基喹啉的体内烷基化作用。静脉注射Terazosin 会产生低体温和呼吸频率降低，这表明交感神经外流减少。Terazosin 对裸鼠血管内皮生长因子诱导的血管生成有显著抑制作用（IC50 为 7.9 μM），表明其抗血管生成作用比细胞毒性作用更强[3]。

To determine the cytotoxic effect mode of action, several identification techniques were used in the current study. Apoptotic cells are detected in situ using terminal deoxynucleotidyl transferase deoxyuridine triphosphate nick end labeling. Results show a positive reaction after a 12-hour treatment of PC-3 cells with terazosin (100 μM). (Only for Reference)