Which beta blocker has the least side effects and is the safest and best tolerated? i have wolff-parkinson-white syndrome & can't find a suitable one

Variable: Side effects can be specific to the individual. Newer beta blockers, like bystolic, (nebivolol) have potentially fewer side effects for most, but not indicated by fda for WPW (can be used off label). In general second generation water solube and cardioselective beta blockers like atenolol or metoprolol have fewer side effects than 1st generation lipid soluble beta blockers (like propanolol).

Varies: All beta blockers have similar side effects but affect different people in different ways. Talk with your doctor about trying Nadolol or atenolol. At your age with wpw, i would consider an electrophysiology study (eps) for risk stratification and possible catheter ablation. That could eliminate the need for beta blockers.