How to Keep Medications Safe During a Power Outage

Power outages from heat waves, ice storms, and aging electrical grids last longer and happen more often than they did 20 years ago. The Energy Information Administration reports that the average American household lost power for over five hours in 2023. In major-storm states, it was 20 hours or more.

Many seniors take refrigerated medications — insulin, certain injectable arthritis treatments, eye drops, weight-management injections, and some antibiotics. A long outage can ruin medications worth hundreds or thousands of dollars. Worse, it can leave you without a treatment you need to stay healthy. With a little planning, you can keep medications safe through outages of 24 hours or longer.

Most refrigerated medications need to stay between 36 and 46 degrees Fahrenheit, the normal refrigerator range. A few, like some vaccines, have stricter rules. Check the medication's label or pharmacy printout for the exact range.

Here is how long cold lasts once the power goes out. A refrigerator with the door kept shut stays cold for about four hours. A half-full freezer stays cold for about 24 hours. A full freezer lasts up to 48 hours. After those windows, the temperature rises into the danger zone and most medications start to lose effectiveness.

The most useful tool is a digital refrigerator thermometer that records the minimum and maximum temperature. It costs ten to twenty dollars. When the power comes back, it tells you exactly how warm the refrigerator got. Without it, you are only guessing whether a medication is still safe. Most pharmacy organizations recommend keeping one in the refrigerator all the time, not just during outages, because compressors fail even when the power stays on.

For outages longer than four hours, a cooler with ice becomes a temporary refrigerator. You need a sturdy insulated cooler, dry ice or large blocks of frozen water, a separate thermometer inside the cooler, and the discipline to keep the lid closed. Use one large cooler for medications only. Keep it in a cool spot in your home, or at a neighbor's house that still has power.

Two other things are worth knowing. Many independent pharmacies will store temperature-sensitive medications for you during an outage as part of their emergency services. And Medicare provides emergency early refills for prescription drugs that spoiled during a federally declared disaster.

This guide covers preparing before an outage, working out how long your refrigerator will stay cold, moving medications to a cooler, contacting your pharmacy and insurance, knowing which medications you must never use after they get too warm, and getting emergency refills. Set aside about 90 minutes once to gather supplies and build the contact list. After that, an outage becomes a planned event instead of a panic.