cost of lantus
5. Lantus Insulin at VetRxDirect â While this site caters to medicine for pets, it sells what appears to be the same Lantus insulin that others offer to humans â a 10ML vial at a price of $281.49 on our last visit. (www.vetrxdirect.com).6.. Lantus Insulin at VetRxDirect â While this site caters to medicine for pets, it sells what appears to be the same Lantus insulin that others offer to humans â a 10ML vial at a price of $281.49 on our last visit. (www.vetrxdirect.com). 6.