What is angina and what are some of its causes? What is the mechanism of action of NTG in treating angina and what are its adverse reactions? Describe the role of nitrates in the treatment of angina....

What is angina and what are some of its causes? What is the mechanism of action of NTG in treating angina and what are its adverse reactions? Describe the role of nitrates in the treatment of angina. Describe the interaction between nitrates and drugs used to treat erectile dysfunction.