Name six potentially toxic drugs that can be removed by dialysis.

1. carbamazepine
2. lithium 
3. salycilates
4. theophylline
5. toxic alcohols (ethlene glycol, isopropanol, methanol)
6. valproic acid 

With the exception of the toxic alcohols, a drug level can be obtained pretty easily for these drugs at most hospitals.

Source

Hudson, K. and Sinert, R.  "Renal Failure: Emergency Evaluation and Management"  Emerg Med Clin N Am.  2011.