I use goodrx for mine. I get the 10mL vial for $43 from Walgreens. Make sure you pick a pharmacy that doesn't have the "est price" (estimated price). CVS is one of these pharmacies that will charge you more because they say the price online is just that, estimated.
Try to stick with walgreens if possible. Any issues, call the 800 number on the coupon. GoodRx has great customer service.
You're welcome!Thanks for the info!