administration biomedicalmaterials biomimeticpolymers biomimetics blood-brainbarrier brain capsules(pharmacy) centralnervoussystemagents congresses diseases dosage dosageforms drugadministrationroutes drugcarriers drugdeliverysystems drugdesign drugs effectofdrugson liposomes macromolecularsubstances metabolism methods microencapsulation molecularweight nanomedicine neuropharmacology pharmaceuticalpreparations pharmacokinetics pharmacology physiology qu93s7991995 qv785t1851994 respiratoryorgans treatment wb340n279t1985