(medicine) something that treats or prevents or alleviates the symptoms of disease

a drug that reduces muscle contractility by blocking the transmission of nerve impulses or by decreasing the excitability of the motor end plate or by other actions

organic compound formed by reaction between an acid and an alcohol with elimination of water

any substance that causes injury or illness or death of a living organism

the univalent radical CH3- derived from methane

an organic compound with the molecular formula (CH2)5NH.