I think it's alot simpler than that. Read this and see what you think.
ATENOLOL ORAL - Patient Handout
COMMON BRAND NAME(S): Blocadren, Corgard, Lopressor, Sectral, Tenormin, Visken
SIDE EFFECTS: You may experience dizziness, lightheadedness, drowsiness, and blurred vision as your body adjusts to the medication. Use caution engaging in activities requiring alertness.
Because beta-blockers reduce blood circulation to the extremities, your hands and feet may be more susceptible to the cold.