I see on Amazon UK it is £4.74 for 48 tabs, so the max 8 a day would be £25 a month. I would be tempted to speak to individual independent pharmacies to see if they can do you a bulk price to get it cheaper.
At an online chemist in UK, 60 tabs for £4.99. https://ayp.healthcare/60-lope...amp;description=true
Maybe if the market is sewn up in the US, try abroad perhaps.