For children under 12, consult your doctor. Give every 4 to 6 hours, up to 4 times each day. For administration by mouth only. Give every 4 to 6 hours, up to 4 times each day. Protect tablets and caplets from excessive moisture.
Store liquids away from light.
Unless your doctor approves, do not take any of these products if you have heart disease, high blood pressure, thyroid disease, diabetes, or an enlarged prostate gland. If you become dizzy or nervous, or have trouble sleeping, stop taking this medication and check with your doctor. You should also call your doctor if symptoms do not improve within 7 days or you develop a fever. If you develop persistent abdominal pain or vomiting after taking this product, call your doctor immediately. Check with your doctor before combining Sudafed 12 Hour Caplets with any medication for depression or high blood pressure.