You can give yourself the injection at any time of the day but there are some factors that you may want to think about
GH secretagogues like CJC-1295 and Ipamorelin typically require four to eight weeks of consistent use before noticeable changes in body composition appear, as the mechanism works through sustained elevation of GH and IGF-1 rather than an acute anabolic effect

Metabolite Toxicity Membrane damage Enzyme attachment to the cytoplasmic membranes of heart cells Disruption of ion transport across membranes Changes in the integrity of ion channels and transporters Activation of signaling pathways Activation of protein kinases Gene transcription Initiation of apoptosis Side Effects of LC and ALC Administration The administration of drugs like LC and ALC, through mechanisms that are not fully understood, results in the following effects: Preservation of metabolism Improvement of heart function under ischemic conditions In a study conducted in 2003, the administration of 5 and 0.5 mM concentrations of ALC and LC 10 minutes before inducing global ischemia (complete ischemia) did not prevent the occurrence of ventricular fibrillation in rats, but the 5 mM concentration reduced the infarct size

(Signs include extreme fatigue, pale skin and shortness of breath.) If you're worried you might be low on iron, the first step is blood work so your doctor can recommend an appropriate dose
Ferris HA, Perry RJ, Moreira GV, Shulman GI, Horton JD, Kahn CR
Immunol Rev 279(1):7089