Omezole, otherwise known as omeprazole, belongs to a class of medications known as Proton Pump Inhibitors. As the name implies, it inhibits the proton or acid pump, thereby reducing the gastric acid production and hopefully any pain related to acid overproduction.
Dhacopan, on the other hand, is a medicine for cramps and spasms. The other more common names are buscopan or hyoscine, which is essentially the same drug. This is a medicine given to treat cramps and spasms from diarrhoea and IBS.
There 2 medicine are prescribed together from time to time for conditions suspected to be related to both gastric acid overproduction as well as spasms. As far as I am aware of, there is no significant undesirable interaction when they are consumed together. Should you develop any unexpected side effect with these medicines, you should consult the prescribing physician for more information.