I am curious can DXM be mixed with beta-blockers safetly? That beta-blocker specifically being Atenolol/Tenormin. It is taken do to a heart arrhythmia on the right ventrical. Is there still a chance DXM can be used while taking this medication and can it be used in people with this condition? Also is recreational use of DXM fatal for people with high or potentially high blood pressure? btw, what are DXMs effects on the heart and blood pressure. The sooner answered the better.