Omidria

Phenylephrine is a medication primarily used as a decongestant, to dilate the pupil, to increase blood pressure, and to relieve hemorrhoids.[2][3] When taken orally as a decongestant, it relieves nasal congestion due to colds and hay fever.[2] It can be taken by mouth, as a nasal spray, given by injection into a vein or muscle, or applied to the skin.[2] Common side effects when taken by mouth or injected include nausea, headach... [wikipedia]