DS is 7 month now and on a Zantac suspension twice a day.
Reflux can be minor, moderate or severe. Long term untreated reflux can erode the esophagus and even teeth. (eww!). In infants when untreated, it can also lead to more health problems if erosion has occurred.
If baby is waking that often, see a Pediatric GI and get this addressed as soon as possible. The last thing you'd want is not only for your child to be uncomfortable, but also to have any damage. The Zantac helps heal damage as well as medicate.
For infrequent reflux, you can always use Semthicone as needed.