| Antibiotikum | antibiotic |
| Antistatikum | antistatic |
| Antiemetikum | antiemetic |
| Antimykotikum | anti-mycotic antifungal agent antifungal drug antimycotic |
| Antiseptikum | antiseptic |
| antibiotisch | antibiotic |
| Antipyretikum | antipyretic |
| Anxiolytikum | anxiolytic |
| Anabolikum | anabolic |
| Antibakterium | antibacterial |
| Antitussivum | cough medicine |
| Antibiont | antibiont |
| Antibiose | antibiosis |
| Atlantikum | Atlantic |
| Unbioctium | unbioctium |
| Narkotikum | anaesthetic anesthetic |
| Analgetikum | analgesic analgetic |
| Anorektikum | anorectic |
| Anästhetikum | anesthetic |
| Antarktik | Southern Ocean |