The disclosures herein relate generally to acyloxyalkyl carbamate prodrugs o f (.plusmn.) 4 amino 3 (4 chlorophenyl)butanoic acid and analogs thereof, pharmaceutical compositions thereof , methods of making prodrugs of (.plusmn .) 4 amino 3 (4 chlorophenyl)butanoic acid and analogs thereof, methods of usin g prodrugs of (.plusmn.) 4 amino 3 (4 chlorophenyl)butanoic acid and analogs thereof, and pharmaceutical compositions thereof for treating or preventing common diseases and/or disorders such as spasticity and/or acid reflux disease. The disclosures herein also relate to acyloxyalkyl carbamate prodru gs of (.plusmn.) 4 amino 3 (4 chlorophenyl)butanoic acid and analogs thereof which are suitable for oral administration and to sustained release oral dosage forms thereof.