| Angel dust overdose |
| Angel wings plant poisoning |
| Angel’s trumpet |
| Anhydrous Benedict’s reagent poisoning |
| Antacids overdose |
| Anti-rust products |
| Anticoagulant rodenticides poisoning |
| Antidiarrheal agent overdose |
| Antifreeze poisoning |
| Antiseptic mouth rinse overdose |
| Apis venenum purum poisoning |
| Apis virus poisoning |
| Apitoxin poisoning |
| Aqueous – ammonia |
| Arisaema triphyllum poisoning |
| Asphalt |
| Asphalt cement |
| Aspirin overdose |
| Atarax overdose |
| Atensine overdose |
| Atropa belladonna poisoning |
| Atropine with diphenoxylate |
| Automatic dishwasher soap – poisoning |
| Axid overdose |
| Azo 22 overdose |
