Abstract: Many compounds have poor bioavailability or variable bioavailability because of poor absorption of the compound in the small intestine. Conjugation of the compound with bile acid to form a prodrug will increase the bioavailibility of the compound and/or reduce the bioavailability variability of the compound because of the active transport of the prodrug by the intestinal bile acid transporter and because of increased lipophilic nature of the prodrug. A linker group can be used between the bile acid and the compound. One example of a bile acid containing prodrug is acyclovir valylchenodeoxycholate, where valine is the linker group. Another example of this prodrug is atenolol cholic acid amide.