oh, just so you know, Clint_D you should avoid antacids that contain aluminum, calcium or magnesium, or any product that contains iron, including vitamin or mineral supplements. The antibiotic binds with those metals and doesn't work as well
What is the bad effect of doxycycline? Serious side effects are rare but may need urgent medical attention. They include: increased pressure in the brain (headache, blurred vision, vomiting) severe blisters and bleeding in the lips, eyes, mouth, nose and genitals.
Why do I feel weird after taking doxycycline? For example, the drug may cause severe diarrhea or pancreatitis (inflammation of the pancreas). Either of these conditions may cause abdominal pain or upset stomach. If you experience pain in your abdomen or an upset stomach during your treatment with doxycycline, talk with your doctor.