Cutting higher-dose pills in half has become a popular way to lower healthcare costs. Experts say it's safe to do this in some cases, but you have to do it right -- and know when you shouldn't do it at all.

With many medications, you pay the same or nearly the same price regardless of dosage. A 100-milligram prescription and a 50-milligram version may cost the same. Among the most commonly split drugs: uncoated aspirin and certain prescription pills for high cholesterol, high blood pressure and psychiatric conditions such as depression. Some health insurers have lists of pills suitable for splitting.

But before you start slashing your pills and bills, get educated: Though some studies have found that pill splitting can be performed effectively and safely, other research has found pitfalls, notably concerns about accurate dosage. According to one study, doses of tablets split by elderly patients deviated between 9 and 37 percent from the intended dosage, and the greater variations may be dangerous. That's why you should talk to your doctor first.

Tips for safer pill splitting:

• Ask questions first. Talk to your doctor or pharmacist to see if you and your medication are candidates for pill splitting. Ask for a demonstration, then try it yourself and ask if you did it correctly.
  
  
• Use a pill splitter. These devices cost only a few dollars and are safer and more accurate than knives or razor blades.
  
  
• Get help as needed. Some patients cannot split pills accurately because of poor eyesight, confusion, tremors or other issues. Some pharmacies will split pills for you, or ask a reliable relative, friend or caregiver for assistance.