In one sentence, describe what the following article is about:

Before you administer Narcan, make sure to check the person for symptoms of an overdose. Symptoms may include:  Slow or shallow breathing. Gasping noises while sleeping or snoring in an unusual way. Skin that is pale or bluish. A slow heartbeat. Low blood pressure. Unresponsive and will not wake up. . Call 911 or emergency services in your country right away! It is important to ensure that help is on the way before you do anything. Check the person's mouth and throat to ensure that there is nothing blocking their airways. Place one hand on the person's chin, tilt up their head slightly, and pinch their nose closed. Then, make a seal around their mouth with your mouth, breathe in and blow the breath into their mouth. You should see their chest rise as you deliver the rescue breath and then fall as you remove your mouth from their mouth. Deliver one breath every five seconds. Prepare the nasal syringe immediately after giving several rescue breaths (if necessary). Pry or pull off the yellow caps. There are usually two – one at each end of the syringe.  A syringe is not a needle, it's a plastic device that holds the needle – or in this case, what the Narcan screws onto. You can find Narcan through the getnaloxonenow.org website. The tube of Narcan (also labeled under the generic name naloxone) may have a red cap. Pry this off and discard it. Grip the clear plastic wings of the nasal atomizer (the cone-shaped applicator), and insert it onto the syringe. Gently screw the Narcan container onto the barrel of the syringe.  Do not prime or test the spray. It is single-use and can't be reused.  Some Narcan nasal sprays come in single-use, pre-assembled packages. They contain two needle-free devices, one to use in each nostril. Lay the victim on their back and tilt their head back. Place the white cone applicator into one nostril of the victim's nose. Give a short, hard push onto the end of the capsule to spray the Narcan. Deliver half of the container (1cc). Repeat the process immediately in the victim's other nostril.

Summary:
Check for signs of an overdose. Call emergency services Check the person's airway and administer rescue breaths. Remove the yellow caps from the syringe. Take the red cap off the Narcan. Put the three pieces together. Administer the Narcan half in each nostril.