A number of persons have developed toxicity due to acute overdosage with<unk> , either accidentally or intentionally, and via either oral or parenteral administration. The adverse effects include lethargy, bradycardia, marked hypotension and loss of consciousness. The drug may be quantified in blood or plasma to confirm a diagnosis of poisoning, or to assist in a medicolegal investigation following death. Analytical methods usually involve gas or liquid chromatography and specimen concentrations are usually in the 100-1000 μg/L range.
Nifedipine
Atenolol
Captopril
Metoprolol
Nebivolol
Hydralazine
Nitroglycerin 
Lisinopril