What do prostaglandins constrict?

Prostaglandins have a wide variety of effects, and may be responsible for the production of some types of pain and inflammation

'Prostaglandin' means a potent substance that acts like a hormone and is found in many bodily tissues (and especially in semen); produced in response to trauma and may affect blood pressure and...

Prostaglandins are small amounts of hormone-like substances produced by cells.

Hormones