Hi..
Welcome to HEALTHCARE MAGIC..
I have gone through your query and can understand your concern..
As per your complain Cefdinir is an antibiotic and at times antibiotic intake can lead to
hyperacidity and can exaggerate symptoms of Gastritis..
So in case if you are recovering from gastritis the intake of antibiotics can worsen the symptoms..
But as for
Sinusitis the intake of antibiotics is also a mandatory treatment you can continue taking the same but along with it you should take
proton pump inhibitors like
Omeprazole once in the morning empty stomach and once in the evening..
Add more of probiotics like Yoghurt in diet..
Probiotic capsules conatining
Lactobacillus Acidophillus can also be taken orally..
Drink plenty of water..
In case if you still find any discomfort you can stop the intake of antibiotic and consult your treating physician..
Hope this information helps..
Thanks and regards.
Dr.Honey Nandwani Arora..