hyponatremia??? ## Do you mean the drug Declomycin? This medicine is a tetracycline antibiotic used to treat bacterial infections. This medicine is not effective treating infections caused by viruses. SIDE EFFECTS that may occur while taking this medicine include nausea, vomiting, diarrhea, or loss of appetite. If they continue or are bothersome, check with your doctor. CHECK WITH YOUR DOCTOR AS SOON AS POSSIBLE if you experience weight loss, unusual bleeding or bruising, severe skin reaction to the sun or artificial light, vaginal irritation or discharge, headache, or blurred vision. CONTACT YOUR DOCTOR IMMEDIATELY if you experience swelling of your hands, legs, face, lips, eyes, throat, or tongue; difficulty swallowing or breathing; hoarseness; fever; chest pain; or sore tongue. An al...