(Rac)-5-Hydroxymethyl Tolterodine hydrochloride（Cat No.:I045037）is the racemic form of the active metabolite of tolterodine, a muscarinic receptor antagonist used to treat overactive bladder and urinary incontinence. This compound exhibits high affinity for M2 and M3 muscarinic receptors, inhibiting involuntary detrusor muscle contractions and improving bladder control. As the pharmacologically active metabolite, it contributes significantly to tolterodine’s therapeutic efficacy. The racemic mixture includes both (R)- and (S)-enantiomers, which may differ slightly in activity. It is commonly used in pharmacological studies of bladder dysfunction and cholinergic signaling pathways.