Elemental potassium is a soft silvery-white alkali metal that oxidizes rapidly in air and reacts vigorously with water, generating sufficient heat to ignite hydrogen emitted in the reaction and burning with a lilac flame.
An antianginal is any drug used in the treatment of angina pectoris, a symptom of ischaemic heart disease.
Other types of antiviral drugs, such as amantadine (Symmetrel) and rimantadine (Flumadine) are used to prevent or treat certain kinds of influenza (flu).They are given either alone or in combination with flu shots. Still another class of drugs, antiretroviral drugs, targets a specific type of virus calleda retrovirus.ther types of antiviral drugs, such as amantadine (Symmetrel) and rimantadine (Flumadine) are used to prevent or treat certain kinds of influenza (flu).They are given either alone or in combination with flu shots. Still another class of drugs, antiretroviral drugs, targets a specific type of virus calleda retrovirus.