Isn't it awful? Loki takes one from the human pharmacy that is $120/mo. If the drug was for me it would be $30 with insurance. Sometimes I think if everyone had to pay cash for prescriptions they would never be that expensive, but people with insurance don't think about the cost if they only have a $30 co-pay!
As far as pet-meds, they have a website. I'm sure you could check there to see how much of a savings it would be:
http://www.1800petmeds.com/