| Antiarrhythmikum | antiarrhythmic |
| Antiasthmatikum | antiasthmatic asthma drug |
| Antipyretikum | antipyretic |
| Antistatikum | antistatic |
| Antiallergikum | anti-allergy |
| Antibiotikum | antibiotic |
| Antiemetikum | antiemetic |
| Antimykotikum | anti-mycotic antifungal agent antifungal drug antimycotic |
| Antiseptikum | antiseptic |
| Antiästhetik | anti-aesthetics |
| Arrhythmie | arrhythmia |
| Autorhythmie | autorhythmicity |
| Anxiolytikum | anxiolytic |
| Anästhetikum | anesthetic |
| Antarktik | Southern Ocean |
| Antibakterium | antibacterial |
| Antispasmodikum | antispasmodic |
| Antarktika | Antarctica |
| Antihistaminikum | antihistamine antihistaminic drug |
| Antiphlogistikum | anti-inflammatory anti-inflammatory drug |