@dkseelro, our forked Order Entry UI version 1.0-SNAPSHOT can be found here: https://modules.openmrs.org/#/show/266/
However note that there is a disclaimer:
This represents work in progress that has been discontinued since April 2016. This module is provided by the OpenMRS community as is and with all faults.
As @dkayiwa said, you may want to look into Bahmni if the overall medication management is a crucial feature in the context of your implementation.