In addition to OT and to a lesser extent AVP (pitressin), a number of OT and AVP analogues; such as carbetocin (OT agonist) dDAVP (desmopressin, V(2) agonist), terlipressin (V(1a) agonist), << felypressin >> ([[ V(1a) ]] agonist) and atosiban (Tractocile OT antagonist) are also in clinical use.