Promethazine hydrochloride 25mg?

Promethazine hydrochloride 25 mg is a first‑generation antihistamine with antiemetic and sedative effects. A common tablet strength, used for allergy symptoms, motion sickness, nausea/vomiting, and as a sedative.

Key points:
- Typical adult dosing: 25 mg by mouth every 4–6 hours as needed; maximum about 100 mg per day.
- For motion sickness: 25 mg about 1 hour before travel.
- For sleep: 25 mg at bedtime (can cause next‑day drowsiness).
- Important safety: do not give promethazine IV. IV administration can cause serious tissue injury. It is usually given orally, intramuscularly, or rectally per product labeling.
- Do not give to children under 2 years old. Pediatric dosing is weight/age dependent; follow the product label or a clinician’s guidance.
- Common side effects: drowsiness, dizziness, dry mouth, blurred vision, constipation, urinary retention.
- Cautions: avoid alcohol and other CNS depressants; may worsen certain conditions (glaucoma, ulcers, urinary retention, certain heart rhythm issues). Tell your doctor about other meds (especially sedatives, antidepressants, MAO inhibitors).

If you’d like, tell me your age/weight, why you’re taking it, and any other meds or health conditions, and I can tailor a more specific dosing note. Do you want indications, dosing for a particular use, or safety considerations for a specific situation?