Tablet splitting often involves buying higher strength tablets and then breaking the tablets in half or quarter doses as a way to lower drug costs. For instance, a 30 mg tablet may cost the same amount as the 15 mg tablet. So a patient may try to save money by buying the 30 mg tablets and splitting them all in half. This might seem like a smart money-saving strategy, but the practice can be risky.
Why Splitting Tablets is Risky
You might get confused about the correct dose. There have been cases when people have purchased higher strength tablets intending to split them, but then they forgot to split them. Instead, they took the whole tablet. This led to accidentally taking too much medicine.
Equal distribution of medicine in split tablets is questionable. Studies have shown that the actual dose in each half of a split tablet often is different. So while the two halves may look the same, they don't necessarily contain equal amounts of medicine. Even if the tablet is scored with a line that runs down the middle, one half may actually have more medicine than the other.
Some tablets are hard to split. Some tablets are too small to split, may have an unusual shape that makes them hard to split, or may crumble more easily when split. Also, some people may not be able to split tablets correctly. These factors make it difficult to accurately split a tablet.
Not all pills are safe to split. Patients may mistakenly think that any pill can be split. But some pills, such as capsules and time-released drugs, should always be taken whole. For example, some tablets are coated with a substance that helps to release the medicine slowly. Splitting these tablets destroys the coating, which means you might absorb the medicine too fast or not at all.
What if You Still Want to Split a Tablet?
FDA has approved drugs where tablet splitting is part of the manufacturer’s drug application. "If the tablet is approved for splitting, the information will be provided in the drug’s professional prescribing information," says Mansoor Khan, Ph.D., director of the Division of Product Quality Research in FDA's Office of Pharmaceutical Science.
"FDA does not encourage the practice of tablet splitting unless it's specified in the drug’s professional prescribing information. If a patient is considering splitting a tablet, FDA recommends that the patient get advice directly from his or her doctor or pharmacist to determine whether it is appropriate or not for a particular drug."
This article appears on FDA’s Consumer Updates page, which features the latest on all FDA-regulated products.