 <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]  check with the doctor. This medication does not work right away. Some people will feel this medication working within 1 to 2 days, but it may take up to 2 weeks before the full benefit of this drug takes effect. When using mometasone to prevent seasonal allergy symptoms, you may need to start this medication 2 to 4 weeks before pollen season begins. Ask your doctor or pharmacist if you should also use other medications (such as nose drops/spray, allergy drugs taken by mouth) along with this drug until it takes full effect. Keep track of the number of sprays used from the bottle. Discard the bottle after you have used the number of sprays specified on the manufacturer's package. Follow the package instructions to unblock the spray tip if needed and to clean the spray bottle. Tell your doctor if your symptoms do not improve or if they worsen.The side effects of Nasonex 24hr Allergy Nasal: See also Precautions. Nose/throat dryness or irritation, blood-tinged mucus/phlegm, and nosebleeds may occur. If any of these side effects last or get worse, tell your doctor or pharmacist promptly. If your doctor has prescribed this medication, remember that your doctor has judged </s>