 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  your medication into the WebMD interaction checker Check InteractionThe overdose of Naphcon-A Ophthalmic (Eye): This medicine may be harmful if swallowed. If someone has overdosed and has serious symptoms such as passing out or trouble breathing, call 911. Otherwise, call a poison control center right away. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include: drowsiness, decreased body temperature, slow/shallow breathing.  Notes Avoid allergens that may be the cause of your symptoms. Some common causes of allergies include pollen, grasses, weeds, dust mites, and pet dander.  Missed Dose If your doctor has directed you to use this medication on a regular schedule and you miss a dose, use it as soon as you remember. If it is near the time of the next dose, skip the missed dose. Use your next dose at the regular time. Do not double the dose to catch up.  Storage Store at room temperature away from light. Keep all medications away from children and pets. Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Proper </s>