Co-tenidone

Co-tenidone (BAN) is a non-proprietary name used to denote a combination of atenolol and chlortalidone. Co-tenidone is used in the treatment of hypertension. The use of β-blockers in hypertension was downgraded in June 2006 in the United Kingdom to fourth-line as they perform less well than other drugs, and that atenolol, the most frequently used β-blocker, at usual doses carries an unacceptable risk of provoking type 2 diabetes.

Formulation
Two strengths of co-amilozide is currently available in the UK:
 * 50 mg atenolol and 12.5 mg chlortalidone, BAN of Co-tenidone 50/12.5
 * 100 mg atenolol and 25 mg chlortalidone, BAN of Co-tenidone 100/25