Phenytoin.
Cimetidine.
Iron supplements.
Red/orange urine.
Rifampin.
Enzyme inhibitors.
B vitamins.
<p>Phenazopyridine, Senna laxative, Rifampin ,Doxorubicin ,phenytoin</p>
<p>Metronidazole, Nitrofurantoin, Carbidopa / levodopa</p><p></p><p></p>