Used as internal standard for method validation in Bioanalytical Studies.
These come under stable labelled Isotopes
Deuteration has no effect on biological potency or selectivity
Potential for drug to have longer half life and reduced/less frequent dosing
Improve metabolite profile : prevent formation of toxic Metabolites
Example : (+/-)-4-Hydroxy Propranolol-d7 Hydrochloride
It is a labelled metabolite of Propanolol
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