Yes.... You can take it twice a day.... Basically it reduces your acid secreation in stomach and delays it's digestion in stomach... And help you to have slow digestion... Less likey to cause acid reflux....
Next Steps
Actually it is very important to differentiate it from causes... it might be something else.... you should consultant a doctor
Health Tips
Drink at least three to four litrs water every day... most preferably before meal and after 2 hrs of eating...
Eathing healthy...
Having dinner quit early if possible... or before 3 hrs of sleeping.