Addrena Reviews br I have trouble with my ability to pay attention. I guess you could say that I have adult ADD. I have tried many things to help me pay attention and concentrate and this supplement is the best alternative to Adderall available without a prescription. Addrena is a very helpful alternative to Adderall because it contains more than just stimulants, it contains cognitive enhancers as well. The stimulants and cognitive enhancers combined make it a great stack for energy and increased focus.