3d image of pholcodine skeletal formula

pholcodine opioid cough suppressant antitussive cough sedative morpholinylethylmorphine homocodeine lozenges highly controlled precursor blood–brain barrier central nervous system cns reflex centre medulla respiratory depression anaphylaxis anaesthesia neuromuscular blocking agents drug preparation mount treatment medicine medication side effect adverse action iatrogenic overdose contraindications interaction pharmacology pharmaceutics pharmaceutical pharmacy pharma pharmacodynamics pharmacokinetics pharmacophore molecule molecular formula skeletal structural structure 3d