麦角新碱，英文名为Ergometrine ，或者 ergonovine 又或者称为D-麦角酸β-氨基丙醇, 是一类用于引起子宫收缩来治疗阴道产后出血的药物。 它可用于口服，肌肉注射或静脉注射。口服15分钟起效，注射则更快。药效持续45到180分钟。

常见副作用包括血压升高，呕吐，癫痫,头痛，血压降低等。其他严重的副作用包括麦角中毒。 它最初是从黑麦麦角菌制成，但现在也可以从麦角酸制成。 由于能够用来制作麦角酰二乙胺（LSD），麦角新碱受到管制。

Ergometrine also known as ergonovine or d-lysergic acid beta-propanolamide, is a medication use to cause contractions of the uterus to treat heavy vaginal bleeding after childbirth. It can be used either by mouth, by injection into a muscle, or injection into a vein. It begins working within 15 min when taken by mouth and is faster in onset when used by injection. Effects last between 45 and 180 minutes.