They exist because injecting substances into your body is serious, and you deserve the same standards that apply to any other medication you'd take
Miller TR, Wagner JD, Baack BR, Eisbach KJ
View on PubMed Contributions by the Brain Renin-Angiotensin System to Memory, Cognition, and Alzheimer's Disease Reviewed the role of brain angiotensin signalling in learning, memory, and neurodegeneration, providing mechanistic context for angiotensin IV analog therapies including Dihexa (J Alzheimers Dis, 2019)
What is important to you in terms of controlling symptoms and quality of life
However, some people may do things to make them feel more awake or to help them feel better the next morning