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Most people keep their medications in the bathroom medicine cabinet. It is right there in the name, after all. But bathrooms are actually one of the worst places in your home to store medications — and keeping drugs there can make them less effective or even unsafe.

Here is what you need to know about storing medications properly.

Why the Bathroom Is a Bad Choice

Bathrooms experience dramatic swings in heat and humidity every time someone showers or runs hot water. Most medications are sensitive to both.

• Heat speeds up the chemical breakdown of active ingredients, reducing potency
• Humidity causes tablets and capsules to absorb moisture, which can make them crumble, clump, or degrade faster
• Light from bathroom windows or overhead fixtures can also break down certain medications

The result: a medication stored in a steamy bathroom may lose effectiveness well before its printed expiration date.

The Best Places to Store Most Medications

A cool, dry bedroom drawer or cabinet

A dresser drawer or a closed cabinet in your bedroom is ideal for most oral medications — tablets, capsules, and liquids. It stays at a consistent room temperature, away from moisture and direct light.

A kitchen cabinet away from the stove and sink

If you prefer to keep medications in the kitchen (where you are more likely to remember to take them with meals), choose a cabinet that is away from the stove, dishwasher, and sink. Heat and steam from cooking and washing dishes can be just as damaging as bathroom humidity.

A dedicated medication box or lockbox

A small lockbox or medication safe is an excellent option, especially in homes with children or teenagers. It keeps medications organized, protected from environmental damage, and inaccessible to anyone who should not have them.

Medications That Require Refrigeration

Some medications must be kept cold to remain effective. Common examples include:

• Insulin — most insulin products should be refrigerated until opened; check the specific instructions for your brand
• Some eye drops and ear drops — check the label
• Certain liquid antibiotics — especially those mixed from powder at the pharmacy
• Some biologics and injectable medications

Store refrigerated medications in the main body of the refrigerator, not in the door (where temperatures fluctuate more) and not in the freezer unless specifically instructed. Keep them away from food to prevent accidental ingestion.

Always check the label or ask your pharmacist if you are unsure whether a medication needs refrigeration.

Medications That Should Never Be Frozen

Unless the label specifically says to freeze, do not put medications in the freezer. Freezing can damage the structure of tablets and capsules, cause liquids to separate, and degrade active ingredients.

Keep Medications Away from Children

This is non-negotiable. Accidental ingestion of medications is one of the leading causes of poisoning in young children. Even vitamins and supplements can be dangerous in large amounts.

• Use child-resistant caps — and make sure they are fully closed after every use
• Store medications out of sight and out of reach, not just out of reach
• Never refer to medications as "candy" to encourage a child to take them
• Consider a lockbox if you have young children or grandchildren visiting regularly

The Poison Control Center number in the US is 1-800-222-1222 — save it in your phone.

Medications in the Car

Never leave medications in your car for extended periods. Car interiors can reach temperatures well above 100°F in summer and drop below freezing in winter. Both extremes can degrade medications rapidly.

If you carry medications with you during the day, keep them in a small pouch in your bag or pocket rather than in the glove compartment or center console.

Traveling With Medications

When traveling by air, always keep medications in your carry-on bag — never in checked luggage. Cargo holds can experience extreme temperatures, and lost luggage can leave you without essential medications.

Keep medications in their original labeled containers when traveling, especially across state or international borders.

A Simple Rule to Remember

Think of medications like you think of food: keep them cool, dry, and away from light. If you would not leave a chocolate bar in that spot on a hot day, it is probably not a great place for your medications either.

When in doubt about storage requirements for a specific medication, the label is your first resource — and your pharmacist is always happy to answer questions.