Ключевые слова: acute, amino amide, anaesthetic, atomic, atoms, biochemical, biochemistry, birth, cancer, carbon, chemical, chemistry, codeine, compound, depression, disease, drug, enol, epidural, ether, formula, gaseous, gaseous constituent ions, health, healthcare, labor, lattice enthalpy, medication, medicine, methyl, molecular, molecule, narcotic, nerve, nitrogen, opioid, organic, oxygen, pain, pregnancy, relief, research, science, severe, structure, substance, therapy, treatment,