Final answer:
The two drugs that can be used to 'fix' the activation of the sympathetic nervous system associated with heart failure and increased heart rate are Metoprolol and Carvedilol.
Step-by-step explanation:
The two drugs that can be used to 'fix' the activation of the sympathetic nervous system, which is associated with heart failure and increased heart rate, are Metoprolol and Carvedilol. These drugs belong to a class of medications called β-blockers, which work by blocking the β-receptors associated with vasoconstriction and cardioacceleration. By blocking these receptors, these drugs help to lower heart rate and improve cardiac function in individuals with heart failure.