| Drug | Antagonist / Antidote |
| Atropine | Physostigmine |
| Morphine | Nalloxone |
| Pentobarbital sodium | Yohimbine |
| Organo-phosphorus compound | PAM |
| 5-OH Tryptamine | Methysergide, LSD, Ergot alkaloid |
| Kallikrien | Aprotonin |
| Angiotensin | Saralosin |
| Heparin | Toluidine Potamine |
| Vitamin K | Coumarine |
| Alcohol | NaHCO3, or Na-citrate |
| Aercoline | Atropine sulphate |
| Aspirin | NaHCO3, Coramine |
| Barbiturate | Amphetamine |
| Barium | MgSO4 |
| Belladona | Tannic acid |
| Benzoic acid | Siquil, Diuretics |
