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.
At his last doctor visit, the doctor lowered the atenolol dose to 25mg to be taken at night due to a pulse in the 40s and my statement that my brother seemed a little slower moving. After 10 days on the reduced dose, my brother developed complete insomnia (no sleep at all for 6 nights straight).