It is the opposite of a mydriatic substance, which causes dilation of the pupil.

Some cycloplegic drugs can cause dilation of the pupil for several days.

Use of central nervous system stimulant drugs and some hallucinogenic drugs can cause dilation of the pupil.

The use of the sympathomimetic drug causes the iris dilator muscle to be directly stimulated, causing increased dilation.

Congenital anomaly causes abnormal proliferation and dilation of lymphatic channels.

The condition causes dilation (widening) of the left lower chamber of the heart, which continues to get worse with time.

Histamine causes dilation and increased permeability of capillaries close to the basophil.

It is known that kinins are inflammatory mediators that cause dilation of blood vessels and increased vascular permeability.

It may also cause pupillary dilation and a rise in systolic blood pressure.

This group of drugs causes dilation of blood vessels which results in lower blood pressure.