Tenoretic. Atenolol and chlorthalidone have been used singly and concomitantly for the treatment of hypertension. The antihypertensive effects of these agents are additive, and studies have shown that there is no interference with bioavailability when these agents are given together in the single combination tablet. Drug Information on Tenoretic 100, Tenoretic 50 (atenolol and chlorthalidone) includes drug pictures, side effects, drug interactions, directions for use, symptoms of overdose, and what to avoid. Easy-to-read patient leaflet for Tenoretic. Includes indications, proper use, special instructions, precautions, and possible side effects. Includes indications, proper use, special instructions, precautions, and possible side effects. Tenoretic 50 Tablets (atenolol 50 mg and chlorthalidone 25 mg), NDC 0310-0115, (white, round, biconvex, uncoated tablets with Tenoretic on one side and 115 on the other side, bisected) are supplied in bottles of 100 tablets. Tenoretic tablets must not be given during pregnancy or lactation. 4.4 Special warnings and precautions for use Due to its beta-blocker component Tenoretic tablets: How to use Tenoretic 50. See also Warning section. Take this medication by mouth with or without food as directed by your doctor, usually once daily. TENORETIC prescription and dosage sizes information for physicians and healthcare professionals. Pharmacology, adverse reactions, warnings and side effects. What should I discuss with my healthcare provider before taking atenolol and chlorthalidone (Tenoretic 100, Tenoretic 50)? You should not use this medicine if you are allergic to atenolol or chlorthalidone, or if you have: Caution should be exercised when TENORETIC (atenolol and chlorthalidone) is administered during pregnancy or to a woman who is breast-feeding. (See PRECAUTIONS, Nursing Mothers. TENORETIC (atenolol and chlorthalidone) was studied for teratogenic potential in the rat and rabbit. Find information about common, infrequent and rare side effects of Tenoretic 50 Oral.