In fact, blockade of heme catabolism in the intestine by a heme oxygenase inhibitor can produce iron deficiency (Kappas et al., 1993)
University of IowaEric Hoffman*, Janice Cook-Granroth
However, the well-recognized pleotropic effects of GLP-1R agonists (normalization of neurogenesis and synaptic plasticity, protection against neuronal apoptosis, and suppression of increased oxidative stress), in conjunction with the presence of GLP-1Rs in the hypothalamic nuclei that regulate sleep and wakefulness, suggest several possible direct effects of GLP-1R agonists in affecting sleepiness and other related parameters (memory, anxiety, and depression) [77, 114]
For official pharmacokinetic details, see the lispro prescribing information provided by the manufacturer (prescribing information)
Both are popular, but they work very differently