 <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]  stomach upset occurs, it may help to take this medication with food or milk. Drink plenty of fluids when you use this medication unless otherwise directed by your doctor. The fluid will help loosen the mucus in your lungs. If you are using the liquid form of this medication, carefully measure the dose using a special measuring device/spoon. Do not use a household spoon because you may not get the correct dose. If your liquid form is a suspension, shake the bottle well before each dose. The dosage is based on your age, medical condition, and response to treatment. Do not increase your dose, take it more often, or use it for a longer time than directed. Improper use (abuse) of this medication may result in serious harm (including brain damage, seizure, death). Tell your doctor if your condition lasts for more than 1 week, if it gets worse, or if it occurs with a headache that doesn't go away, rash, or fever lasting more than 3 days. These may be symptoms of a serious medical problem and should be checked by a doctor.The side effects of Vicks Nyquil Nighttime Relief Oral: See also Warning section. Drowsiness, dizziness, blurred vision, upset stomach, nausea, constipation, or </s>