Apart from use on the website and business cards, the primary purpose of the branding and logo is to appear on every single pack of medicine and every single medicine bottle.
The two main components I will love your help with are the "Xylex" branding in both images as well as the flying bird in red which is also an X.
Please see attached samples for both these types of medicine packs. These designs for packages aren't final but it'll be very similar to this.
The branding will be used most commonly with a white background but as you'll see it'll also be used on dark backgrounds like the bottles. So ideally I think it'll be two different treatments for light and dark backgrounds but totally open to what you recommend.
Totally open to different color treatments as well, I think the Xylex logo needs the most work along with the bird.