Thanks everyone for the replies. I've used the other U-Gard products in the past when the horses back off their feed and respond to liquid antacids and/or Tums. Those times they weren't getting such a variety of supplements that I worried about possible interactions. 
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Jennifer in Middle TN  2010
 Mill 33 yrs Arabian-PPID, IR & Pacemaker Dependent
Jack 22 yrs TN Walker- IR & RAO

https://ecir.groups.io/g/CaseHistory/files/Jennifer%20and%20Millionairess

https://ecir.groups.io/g/CaseHistory/album?id=831

https://ecir.groups.io/g/CaseHistory/files/Jennifer%20and%20Jack-TN%20Walker