Since you recently switched from metoprolol to Concor (bisoprolol), this rash could be a side effect or an allergic reaction to the new medication. Please contact your doctor promptly so they can evaluate your skin and safely adjust your treatment. It is very important that you do not stop taking your Concor suddenly, as stopping a beta-blocker abruptly can cause your fluttering heartbeat to return or worsen. However, if you develop any swelling of your face, lips, or throat, or have any trouble breathing, please seek emergency medical care immediately.
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What should I do if I have developed a skin reaction two weeks after switching from metoprolol to Concor 5mg for a fluttering heartbeat?