dear marilyn i am sorry to hear about your son s stroke but if you are trying to implicate that it happened because he was on atenolol, that wont be true it might have been due to an uncontrolled hypertension but not because of the drug i will tell you a bit about how stroke happens maybe that will help you understand why atenolol cant cause stroke directly There are few basic ways in which the blood vessel is affected : One is that the flow of blood is stopped by a plug inside the artery. This plug may have formed in the vessel, like a thrombus (A blood clot). Alternatively, some kind of particle may flow in from another part of the body and come to get stuck in the vessel (also known as emboli). Sometimes, fat may accumulate in the vessel and gradually reduce the lumen of the vessel till very minimum blood can flow through it (atherosclerosis). Again, alternatively, the vessel walls may contract thereby reducing the flow of blood through it (stenosis). Finally, the vessel may have ruptured causing a cerebral haemorrhage, thereby causing a stroke. so you may understand stroke is not because of a drug i hope he heals fast make sure he gets physiotherapy regularly best of luck