The pills have the following imprint on one side; ZA 21 the other side is blank. The pill is oval and tan. Please help!

Where did you find it? It would be wise to take it to your local pharmacy for proper identification and disposal.

It's Simvastatin, a cholesterol lowering medication

Complete Simvastatin information from Drugs.com (http://www.drugs.com/cdi/simvastatin.html)

Are you sure about that LT? I checked drugs.com with the name and the pill identifier did not show this particular description. The imprints were not the same as described above.

I use Kinney Drugs actually, it doesn't give information about the drug itself but it has a larger library of markings. Once it gives the name, if needed, I will get the drug inforamtion off another site

Kinney Drugs | Drug IDentifier (http://cpref.goldstandard.com/pid/idsetup.asp?type=mark&i=1&r=5057)

It's Simvastatin, a cholesterol lowering medication

Complete Simvastatin information from Drugs.com (http://www.drugs.com/cdi/simvastatin.html)

Thank you! :)