If you have been on baclofen for a long time (more than months) then stopping cold turkey can have some major withdrawal symptoms.

If you take baclofen for spasms, I cannot see how Voltaren (diclofenac) can help. Some medical people think that drugs' names are similar. Baclofen sounds like ibuprofen....this is just an example. In some cases drug names borrow the endings...
Triptans for headache for example. Sometimes this signals a "family" of drugs related...and other times it does NOT.

Baclofen is a generic. You are not going to get it any less expensive for that reason. Its brand name is Lioresal.

Here is a link to pricing from Costco..it is typical for other places:
http://www.costco.com/Pharmacy/frame...ticle=BACLOFEN

Kroger and WalMart may have comparable pricing.
What are YOU paying for yours? You need to call around and ask other pharmacies their prices. I find this "high" that you can't afford confusing.