Hello Mucinex D is a mucolytic and decongestant drug and the drug can be safely taken with the drugs you are taking like amiodarone, warfarin, losartan. amlodipine. simvistatin and doxazosin. Since you are having sinus and ear congestion the tablet mucinex- D can be safely taken. Hence continue the tablet as per the advice of your doctor. Dizziness is usually because of inner ear problem or because of systemic problems like uncontrolled hypertension. Hence do consult your doctor if dizziness increases or not comes down with treatment. Thank you