Hi, my sister was diagnosed with cataract and glaucoma, her doctor prescribed latanoprost 0.05% Opthalmic Solution and she found a natural medication called CAN-C containing N-Acetylcarnosin 0.01%, Glycerin (lubricant) 1.0%and carbixymethylellulose sodium (lubricant)0.3%, the last medicine is for cataract, do you think it is okay to use both?