Abstract: There is disclosed an oral delivery system, which comprises: a sachet at least partially formed from at least one microporous permeable membrane, and defining a cavity; a physiologically active substance dissolved or dispersed in a liquid or gel, within the cavity, the microporous or permeable membrane being in contact with the liquid or gel and being permeable to the physiologically active substance in the liquid or gel; and an encapsulating layer surrounding the sachet; characterised in that either: a) the membrane is hydrophilic and the contents of the sachet are hydrophobic; or b) the membrane is hydrophobic and the contents of the sachet are hydrophilic; whereby, in use, the encapsulating layer is first dissolved in the gastro-intestinal tract (GIT) and thereafter passage of the physiologically active substance into the GIT through the membrane is rate-controlled. A method of manufacturing the oral delivery system is also disclosed.

Abstract: Homogeneous herbicidal compositions were prepared by dissolving a water-insoluble ester of fluroxypyr or triclopyr in an aqueous solution of an alkali metal or amine salt of an herbicidal acid, such as 2,4-D, MCPA, or dicamba.