PREVACID NapraPAC 500Side Effects - XML FEED - Medications.com http://www.medications.com/se/PREVACID+NapraPAC+500 Recent side effects for PREVACID NapraPAC 500 Although this drug helped my reflux tremendously I am going off o Sat, 26 Apr 2008 09:06:48 -0400 http://www.medications.com/effect/view/29946 Although this drug helped my reflux tremendously I am going off of it because of the weight gain. I gained nearly 17 pounds in 3 months time. http://www.medications.com/effect/view/29946