<prompt> A 2 years old child without fever develps bone pain, vomiting and features of increased intracranial pressure following excessive medication. The drug most likely to be responsible for this is?Vitamin APhenothiazinePhenytoinVitamin D  <response>: Ans. is a i.e., Vitamin A Hvpervitaminosis A o Excess of vitamin A can lead to rupture of lysosomal membrane. o Acute manifestations -- Signs and symptoms are due to raised intracranial tension pseudotumor cerebri -- headache, nausea, vomiting, drowsiness, bulging fontanelles, diplopia, papilledema and cranial nerve palsies. o Chronic intoxication -- Anorexia, weight loss, painful extremities, dry itchy desquamating skin, alopecia, coarsening of hair, hepatosplenomegaly, bone abnormalities and bony swelling. 