OMNI™ by OSRX®    Tim + Brim + Dor + Lat
Dosing q.p.m. This is the PM arm of the "Triple/Quad, AM - PM pairing".
It is intended for use in unison with the triple "AM combination"1.
Chem Specs timolol 0.5%,  brimonidine 0.15%,   dorzolamide 2.0%,   latanoprost 0.005%
Quantities 3.5ml,
Cost 60.00
Class timolol:           Non-selective beta-adrenergic receptor blocker.
brimonidine:   Relatively selective alpha-2 agonist.
dorzolamide:   Carbonic anhydrase inhibitor
latanoprost:    Prostaglandin analog (prodrug)
Usage Easier to use and more cost effective than single-medication alternatives.
Contraindications
timolol

Bronchial asthma, a history of bronchial asthma, COPD, sinus bradycardia,
second or third degree atrioventricular block, overt cardiac failure, cardiogenic shock.
Numerous additional cautions listed here.

brimonidine

neonates and infants (under the age of 2 years)
Vascular insufficiency cautions listed here.

dorzolamide

Sulfonamide hypersensitivity.

latanoprost

Latanoprost hypersensitivity
Pediatric use Safety and effectiveness in pediatric patients have not been established.
Pregnancy Category C   Embryofetal lethality shown in rats and rabbits at clinically relevant doses.
1. The "AM combination" timolol brimonidine dorzolamide is similar but lacks latanaprost (daily dosing).
0.001% BAK
Individual drugs are FDA approved but the combination is not.