H Rx Feline Drops contains a standardized amount of essential oils extracted from the whole H plant grown both organically and domestically. This essential oil is rich in terpenes, flavonoids and phytocannas. Supplied in 15 ml bottles with a glass graduated dropper, H Rx Feline Drops has been blended with organic MCT oil to produce an odorless, tasteless liquid. H Rx Feline Drops is the only whole H extract available exclusively to veterinarians, and maintains the high standards of quality veterinarians have come to expect from Rx Vitamins.