These agents work by binding to<unk>  in the GI tract, thereby making it unavailable to the body for absorption. Hence, these drugs are usually taken with meals to bind any<unk>  that may be present in the ingested food.<unk> s may be simple molecular entities (such as magnesium, aluminium, calcium, or lanthanum salts) that react with<unk>  and form an insoluble compound.<unk> s such as sevelamer may also be polymeric structures which bind to<unk>  and are then excreted.
Phosphate binder
Potassium binder
Salt substitute
Bisphosphonate
Mercurial diuretic
Nonsteroidal anti-inflammatory drug
Lipase inhibitors
Carbonic anhydrase inhibitor