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The HFI series of compounds, e.g., 37 (HFI 419) identified in 2008 after the virtual screening are much more drug-like than the hexapeptides 11 (AL-11), 12 (IVDE77), and the potent macrocyclic Ang IV analogue 23 (HA08) and can hopefully after further systematic optimization be converted into bioactive small molecules with capacity to cross the blood-brain barrier

10.1093/toxsci/kfu222 68 LoftisJ

Some people use it to boost physical performance (though its banned by the World Anti-Doping Agency, so its a no-go for athletic competition)

J Stud Alcohol 61: 512, 2000

This indicates that you may need more frequent injections especially when you get to the 3 month maintenance injections