Systematic rotation of injection sites is important for preventing tissue changes and localized inflammation that can cause discomfort
Klausen M, Justesen S, Pedersen J et al.Once-weekly semaglutide versus placebo in patients with alcohol use disorder and comorbid obesity: a randomised, double-blind, placebo-controlled trialThe Lancet, 407, 1687-1698 Herman, Rae J
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Direct the diluent stream against the interior wall of the vial to reduce foaming
Neither is universally "better." The right choice depends on the injury type, location, chronicity, your budget, and whether you value convenience or concentrated local delivery
doi: 10.1016/S0140-6736(09)62124-3 82 CurranKPetoTJonasJBfriedmanDKimJELeasherJet al