Published on Aug 28, 2018
DAILY MCQ 44 answer

A drug is supposed to be more absorbed through skin. In case if a person comes in contact with the drug which is the order of penetration of the drug resulting in maximum systemic concentration

A) Post auricular >scrotum>scalp>dorsum of arm>plantar area

B) scalp>scrotum>post auricular >dorsum of arm>plantar area

C)plantar area>dorsum of arm>scalp>scrotum>post auricular 

D) scrotum > scalp > post auricular >dorsum of arm > plantar area

Answer: A) Post auricular >scrotum>scalp>dorsum of arm>plantar area

ref: kdt 7e/p 895

Decreasing order of penetration

Post auricular >scrotum>scalp>dorsum of arm>plantar area

Note:

penetration

  • high at axilla, groin, face, scalp and scrotum
  • medium at limbs and trunk
  • low at palm, sole, elbow and knee