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An effective formulation will enhance penetration and create that crucial tissue reservoir, maximizing the local effects despite the short systemic GHK-Cu half life

2009 Sep;42(13-14):1431-7

In certain pathological or abnormal physiological states, this balance may be disturbed

Side Effects: Sedation Parkinsonism symptoms QT prolongation (may be significant if taking with drugs inhibiting CYP3A4/5 or 2D6) Pharmacokinetics: undergoes rapid hepatic metabolism involving carbonyl reductase and CYP2D6 to 2 deuterated active metabolites -dihydrotetrabenazine (-HTBZ) and -dihydrotetrabenazine (-HTBZ), with eventual renal elimination of metabolites the -HTBZ and -HTBZ metabolites are primarily responsible for the pharmacological & therapeutic effects produced by the parent prodrug twice a day dosing effect half life 9.4 hours (Schneider et al, 2021) HT: Resistant Hypertension