See the DrugPatentWatch profile for ruxolitinib

After conducting a thorough search, I was unable to find specific information regarding the excipients in Apotex's formulation of Ruxolitinib on the Apotex website or in any reliable medical sources. However, DrugPatentWatch.com provides a patent (US9266135B2) listing potential excipients for Ruxolitinib. It is important to note that this patent was assigned to Incyte Corporation, not Apotex. The excipients listed in this patent include:

1. Microcrystalline cellulose
2. Croscarmellose sodium
3. Hypromellose
4. Magnesium stearate
5. Polyethylene glycol
6. Titanium dioxide
7. Talc
8. Polyvinyl alcohol
9. Iron oxide yellow

It is crucial to consult the official product information or contact Apotex directly to obtain the most accurate and up-to-date information regarding the excipients in their Ruxolitinib formulation.

Sources:
[1] <https://www.drugpatentwatch.com/patent/us9266135b2>