| STIMULANT | A drug or similar substance that increases physiological activity |
| GEOLOGY | The study of rocks and similar substances that make up the earth's surface (7) |
| ISOMER | Iridium contains a considerable amount of a similar substance |
| CATALYST | A substance that increases the rate of a chemical reaction without itself suffering any permanent chemical change (8) |
| DIURETIC | Substance that increases the flow of urine from the body (8) |
| HORMONE | It creates physiological activity in wild moorhen (7) |
| SHOT | A gun blast synonymous with conjecture, guesswork or speculation when figuratively undertaken in the dark; otherwise, a dram of spirits; a jab of a drug; or, a serving of espresso (4) |
| REMEDY | A drug or agent that cures a disease or controls its symptoms (6) |
| SMACK | A boat, a drug or a slap |
| DOSE | A prescribed quantity of a drug; or, a bout of something unpleasant (4) |
| SIDEEFFECT | A secondary, usually undesirable consequence of a drug or medical treatment (4,6) |
| DRAGEE | Sweetmeat enclosing a drug, or a nut/fruit, etc (6) |
| PRESCRIBE | To recommend or order the use of a drug or other remedy (9) |
| PALLIATIVE | A drug or treatment that relieves suffering without treating the cause of the condition (10) |
| TINCTURE | Solution of a drug or chemical in water (8) |
| MEDICATION | A drug or remedy (10) |
| CERAMIC | A hard brittle material made by firing clay and similar substances. (7) |
| MORALEBOOSTER | A person, activity etc. that increases one's confidence or optimism (6,7) |
| MEDICINE | From "physician, doctor", word for the art or science of preserving and restoring health; or, a pharmaceutical analeptic, cure, drug or remedy (8) |
| REMEDIES | Drugs or agents that cure a disease or control its symptoms (8) |
