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References Double-blinded comparison of diphenhydramine versus lidocaine as a local anesthetic The objective of this study was to evaluate the efficacy, onset of action, duration of action, and side effects of 1% diphenhydramine compared with 1% lidocaine when used as a local anesthetic agent

Cell Cycle (2014) 13(15):241530

While this represents a higher per-treatment cost than oral supplements, the superior absorption and reduced frequency often make injections cost-competitive over time, particularly for those who dont absorb oral forms effectively

The difference in chemical structure between this peptide and the original IGF-1 is the substitution of arginine at the third position, which significantly modifies the compound

They are also used in dermatology, particularly in repairing the natural skin-barrier function [229]

(PubMed) de Menezes Barbosa EG, Junior FB, Machado AA, Navarro AM