Thanks for writing your quuery.
Alcohol can cause gastritis
due increase in the acidity in the stomach.
This seems to be the cause of pain in abdomen in your case. The pain can occur even if you never had such pain before because damage to mucosa of the stomach can be gradual and can develop slowly in due course of time.
You should avoid alcohol and spicy foods.
20 mg alongwith Domperidone
10 mg will be helpful. Take medicines under medical supervision only.
Also get an Endoscopy
done to evaluate the condition of the mucosa of your stomach.
I hope this is helpful to you.