<prompt> What is true of ivermectin?It is the most effective drug for strongyloidosisIt is the drug of choice for onchocerciasisit can be used to treat swcabiesAll of the above  <response>: Ref: KDT 6e p686 Ivermectin is the drug of choice for onchocerciasis river blindness and strongyloidosis. It is also effective against other filarial worms It can also be used orally for the treatment of scabies and pediculosis DEC us contraindicated in onchocerciasis 