Attention Customers: Due to ever increasing popular demand we are out-of-stock on Mag-TabSR!!! Our manufacturer is working hard to get us product by the end of February/March. In the meantime, the drug wholesalers across the country do have inventory that is provided to any retail drug store upon request. Thank you for your loyalty to Mag-TabSR which is the best absorbed and sustained release magnesium supplement available.  You can purchase 60 count bottles and limited 100 count bottles by visiting our store on Amazon.