â¢Migraine headaches -- spots of light, halos, or zigzag patterns are common symptoms prior to the start of the headache. Other potential causes of vision problems include fatigue, overexposure to the outdoors (temporary and reversible blurring of vision), and many medications.
The usual initial dose of atenolol (Tenormin) for adult patients with hypertension is 50 mg taken once a day. The maintenance dose may be adjusted after a couple of weeks.
Hypertension: Oral: Initial: 12.5 to 25 mg once daily; may increase dose to a target dose range of 25 to 50 mg once daily in 1 to 2 divided doses (JNC 8 [James 2014]); usual dosage range (ASH/ISH [Weber 2013]): 12.5 to 50 mg daily.