Table 1.

Plain Radiographic Imaging Characteristics of Drug-Induced Calculi

	Primary Stone	Status on Plain
Drug	Composition	Radiography
Loop diuretics	Calcium oxalate	Radiopaque
Acetazolamide	Calcium phosphate	Radiopaque
Topiramate	Calcium phosphate	Radiopaque
Zonisamide	Calcium phosphate	Radiopaque
Laxatives (when abused)	Ammonium acid urate	Radiolucent
Magnesium trisilicate	Silica	Poorly radiopaque
Ciprofloxacin	Ciprofloxacin	Radiolucent
Sulfa medications	Sulfa	Radiolucent
Triamterene	Triamterene	Poorly radiopaque
Indinavir	Indinavir	Radiolucent
Guaifenesin/ephedrine	Guaifenesin/ephedrine	Radiolucent