This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
All of the following drugs are documented to be porphyrinogenic EXCEPT: 
Select and explain. 
A. Estrogen therapy, B. Carbamezapine, C. Phenytoin, D. Aspirin
D: Aspirin
Answer: D: Aspirin 
Explanation: Aspirin is not a porphyrinogenic drug. There is a very exhaustive list of drugs given in the table from Harrison; I am giving some impoant drugs! Carbamezapine , chloramphenicol, clindamycin Dihydroergotamine , droperidol Hydralazine Fosphenytoin Indinavir Ketamine, ketoconazole Lidocaine Medroxyprogesterone , mifepristone , Nitrofurantoin, norethistronate Phenobarbitone, phenytoin Rifampicin Spirinolactone Taxmoxifem, testosterone Valproate