Cellulose, in one form or another, is a common 'excipent' used in various
pharmaceutical dosage forms ranging from tablets and capsules, to liquids,
eye drops, etc.

Its purpose is to provide bulk, consistency, or sticktoitiveness [sic].  For
example, consider a tablet in which the active ingredient(s) total 5
milligrams in weight.   A typical tablet might weigh 200 - 300 mg or more.
The inert ingredients are what makes the tablet possible--the actives are
just along for the ride.

Do you have a problem with cellulose?

HankG