I called my local walmart (I had to call for a refill of one of mine anyway) and without insurance it's $27.38 for 30 day and $76.90 for 90 day. This is for my dose. Most people are prescribed twice that, so simply double the price since this is the largest dosage they carry.
Now if your doctor wants to save you some money, I am guessing they can just prescribe 4x the smaller pills as they are on the generic $4 list. But if you have insurance it is usually covered as blood pressure medication, as I had mentioned previously.
This pricing is without insurance. There is no sales tax in NJ on prescription drugs, so the price may be slightly different in your state.
So it's not on the $4 list but it's not horribly expensive either.