Which drugs have been shown to discolor teeth when taken during early childhood?

Tetracycline and doxycycline are commonly known used drug which will discolor teeth to a gray color. Erythromycin and clarithromycin are two others. Inhaled corticosteroids can also discolor teeth. Imipenim, co-trimoxazole and cholestramine are lesser known antibiotics which can also cause discoloration.