Respected user, hi I evaluated your query thoroughly . * His condition is due to calamine causing gastritis & gut flora alteration . * Nothing much serious but take some necessary steps as - give combination molecule of proton pump inhibitor with anti emetic 1 hour prior to breakfast & dinner - plenty of liquids in sessions preferably boiled water, coconut water, lemon juice , green tea, coffee , butter milk etc to maintain hydration - small amount of light diet at regular intervals - maintain his BP , blood sugar levels - pre pro biotics in case of more loose motions help - avoid smoking / alcohol Hope this clears your query . Welcome for any further assistance . Thanks for using Healthcaremagic.com & giving me an opportunity to assist Wishing him fine recovery from the same . Regards dear take care .