Had possible gastritis start about 6 weeks ago. Tried rennies, controlling diet, elevated bed head etc but 3 or 4 weeks ago tried taking gaviscon on and off and worked out I have taken 23 doses over that time. Been back to the doctor and she suggested i take it religiously 4 times a day for 7 days. Is this too long to be taking Gaviscon. I am worried about long term side effects.