SPL Set ID: f1d650a5-4205-720b-f39b-4213277b6612

Cladribine tablets contains the nucleoside metabolic inhibitor cladribine, which is a white to off-white crystalline powder with the molecular formula C 10 H 12 ClN 5 O 3 and molecular weight 285.69 g/mol. It differs in structure from the naturally occurring nucleoside, deoxyadenosine, by the substitution of chlorine for hydrogen in the 2-position of the purine ring. The chemical name of cladribine is 2-chloro-2′-deoxy-adenosine. The structural formula is shown below: Cladribine is stable at slightly basic and at neutral pH. The main degradation pathway is hydrolysis and at acidic pH significant decomposition occurs with time. The ionization behavior of the molecule over the pH range 0 to 12 is characterized by a single pKa of approximately 1.21. Cladribine tablets are provided as 10 mg tablet for oral use. Each 10 mg tablet contains cladribine as an active ingredient and magnesium stearate and sorbitol as inactive ingredients. Cladribine tablets also contain hydroxypropyl betadex.