The route or course the active substance takes from application location to the location where it has its target effect is usually rather a matter of pharmacokinetics (concerning the processes of uptake, distribution, and elimination of drugs).
Pravac ili kurs koji aktivna supstanca uzima od mesta primene do mesta gde ostvaruje svoje dejstvo je obično stvar farmakokinetike (zavistan je od procesa apsorpcije, distribucije, i eliminacije lekova).