I Have Been Taking Warfarin Since 2008 - Pill Has

I have been taking warfarin since 2008 - pill has Barr imprinted on one side and 374 4 on the other but bottle says Teva Pharmacy. Latest prescription the warfarin pill has TV 4 on one side and1716 on the other side. bottle says Teva Pharmacy. Dosage is 4 mg. Is it okay to take the latter one? I was told in 2008 that I had to continue taking the same pill from the same pharmaceutical company. Thank You, Jane Janssen