Medications May Be Damaged By Storage Mistakes
By WALECIA KONRAD
What does extreme heat do to medications? I found out while we were sweating out the recent heat wave in a lake cabin in New Hampshire and my 10-year-old son’s allergies kicked up.
I gave him a dose of over-the-counter medicine that usually brings quick relief. But this time the drug had no effect. The same thing happened the next day, and the next.
When I returned home, I asked a pharmacist about it. Was my son becoming immune to this particular medicine? Were his allergies getting worse?
The pharmacist asked where I had stored his pills as the temperatures soared. On the bathroom shelf in the cabin, I said. And on the sweltering six-hour drive to the lake? The medicine was in my suitcase in the trunk of the car.
And that’s when I learned this: No drug should be exposed to temperatures higher than 86 degrees. Some days the bathroom at our vacation house and certainly the trunk of the car were well above that mark.
Extreme temperatures can have a big effect on both prescription and over-the-counter drugs.
Pharmaceutical manufacturers recommend most of their products be stored at a controlled room temperature of 68 to 77 degrees, said Skye McKennon, clinical assistant professor at the University of Washington School of Pharmacy. In truth, that is the range in which manufacturers guarantee product integrity. Anywhere from 58 to 86 degrees is still fine, she said.
“During heat waves and cold spells, storage locations can go above or below those ranges, causing medicines to physically change, lose potency or even threaten your health,” McKennon said.
For patients with such chronic illnesses as diabetes or heart disease, a damaged dose of a crucial medicine, like insulin or nitroglycerin, can be life-threatening. But even common medicines can break down with potentially harmful effects, and you can’t always tell by looking at the pill or liquid that a problem has occurred, said Janet Engle, a pharmacist and past president of the American Pharmacists Association.
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