Yes it might be harmful for you.It may damage your kidney,it may cause gastritis and your digestive system may be disturbed.It may cause food poisoning,stomach ulcer and intestinal infection leading to typhoid fever.It may also cause gastritis you may feel headache and sever abdominal pain.It may damage walls of your stomach and causes ulceration.It may also cause loose motion, vomiting which may leads to severe diarrhea.