| Features | |
| Also known as | Promethazine HCl |
| Blood pressure | May cause hypotension or rarely hypertension |
| Chemical name | Promethazine hydrochloride |
| Dosage (medical) | 12.5 mg to 50 mg orally, intramuscularly, or by rectal suppository, depending on the condition being treated |
| Dosage (sports) | Not applicable |
| Effects | Relief from allergies, motion sickness, nausea and vomiting, and causes sedation |
| Formula | C17H20N2SВ·HCl |
| Half-life | Approximately 10 to 19 hours |
| Hepatotoxicity | Rare, but can occur with long-term use |
| Lab Test | Can cause false positives in drug tests for amphetamines |
| Main action | Antihistamine, antiemetic, sedative |
| Side effects | Drowsiness, dizziness, constipation, blurred vision, dry mouth, photosensitivity |
| Storage conditions | Store at room temperature, away from moisture and light |
| Strength | 10 mg |
| Substance class | Phenothiazine derivative |
| Trade name | Phenergan, Promethegan |
| Use in sports | Not typically used in sports |
| Water Retention | Minimal to none |
| Manufacturer | Abbott Healthcare Pvt. Ltd. |