The conditionwith which your husband is diagnosed is a chronic condition and depending upon the severity the management can vary from simple medication to surgery to cure the condition.
The problem in this condition is that the part of stomach is coming herniated into the diaphragm and because of this the oesophgeal spincture is not able to work properly and lead the gastric content coming into the oesphagus causing problem.
According to to medical management, medication which decreases the acidity is given to supresses the symptom, which is prescriped in the form of REkool-L to you and other medication likel Velgut is just supportive given good bacteria to you gi sysytem and Drotin
DS is an antispasmodic causing decrease in spasm. The Sibofix
is mainly used for pain and I am not clear why this has been prescribed to you for this condition, if you are not having any pain condition and apart from that it can also cause gastric problems.
Thanks and hope this will help you.