Promethazine Dosage — Strengths, Typical Dose & Max Dose
Complete dosing reference for Promethazine (Promethazine Hydrochloride): available forms and strengths, typical adult dose, titration schedule, max dose, and dosing in special populations.
Verified pharmacies compete for your prescription. Free · No account · Bids in 1–4 hrs.
Chain retail
$25/mo
GoodRx typical
~$15/mo
Via Script Unlock
$6/mo
Save up to 75% — ~$228/year for chronic use.
Promethazine Dosing
Promethazine dosing depends on your indication, kidney and liver function, age, and other medications you are taking. Your prescriber selects the starting dose and titrates based on clinical response.
Ask your prescriber for the Promethazine package insert or the FDA-approved prescribing information for full dosing detail.
Promethazine pricing varies dramatically by pharmacy
The same Promethazine prescription can cost $6 at one pharmacy and $25 at another in the same zip code. Chain pharmacies typically charge the most. Script Unlock lets verified independent and mail-order pharmacies compete for your prescription — the winning bid is usually 75% below chain retail.
- Free — no membership, no account, no credit card upfront
- Bids in 1–4 hours from verified US pharmacies
- Locked-in price — no PBM renegotiation at checkout
- Delivery or local pickup
Related Promethazine pages
Medical disclaimer: Dosage information on this page is for reference only and is not a substitute for medical advice. Your prescribing doctor determines the appropriate Promethazine dose for your condition, kidney and liver function, other medications, and clinical response.