This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Other topics and Adverse effects, Subject name: Pharmacology
What is true of ivermectin? 
Select and explain. 
A. It is the most effective drug for strongyloidosis, B. It is the drug of choice for onchocerciasis, C. it can be used to treat swcabies, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: (Ref: KDT 6/e 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