Write an article based on this "Choose an injection site and clean the area. Remove the pen from the refrigerator 15 minutes in advance. Pull the corner tab to open the tray. Check the liquid to see if it looks clear. Peel off the paper backing on the needle. Screw the needle onto the pen. Turn the knob counterclockwise on the bottom of the pen until it clicks."

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The only recommended sites are your thighs, your stomach, or on the backside of your upper arm, near your armpit. Wash the area with soap and water or a cotton ball dipped in isopropyl alcohol. You can inject the same area every time, but avoid sticking the needle in the same exact spot. Place the pen on a counter or in another secure spot. After about 15 minutes, the pen will have reached room temperature. The tab will be on the flat back side of the container in a corner. Grasp it and pull it to free the pen. Remove the pen and needle, inspecting them for any sign of damage before setting them aside. If you notice that the pen looks broken or is missing a piece, avoid using it. The pen’s tube has a small window right below the tip. Make sure the liquid is transparent, free of dirt, debris, or other signs of damage. Clear air bubbles are normal, so don’t worry about them. If the medicine looks dirty, avoid using it! Use a replacement pen instead. The needle is inside the orange or white plastic tip. You’ll notice a piece of paper covering the wider opening. Peel it off with your fingers to expose the needle. Fit the wide end of the plastic tip onto the pen. The side that had the paper backing fits over the pen’s grooved end. Twist the cap clockwise until it’s tightly on the pen. Hold the pen with the needle pointing straight up towards the ceiling. At the very bottom of the pen, locate the handy knob. It has small ridges sticking out of it, so it’s easy to spot. Turn the knob counterclockwise, stopping when you hear a click and the green sticker on the body of the pen has disappeared completely.