Amlodipine is a medication used to treat high blood pressure and coronary artery disease. While not typically recommended in heart failure, amlodipine may be used if other medications are not sufficient for treating high blood pressure or heart-related chest pain.

Ajmaline is an alkaloid that is classified as a 1-A antiarrhythmic agent. It is often used to induce arrhythmic contraction in patients suspected of having Brugada syndrome.

Azacitidine is a chemical analog of cytidine, a nucleoside in DNA and RNA. Azacitidine and its deoxy derivative, decitabine, are used in the treatment of myelodysplastic syndrome. Both drugs were first synthesized as potential chemotherapeutic agents for cancer. 

Atracurium besilate, also known as atracurium besylate is a medication used in addition to other medications to provide skeletal muscle relaxation during surgery or mechanical ventilation.