Promethazine is an antihistamine medication commonly used to treat various conditions such as allergies, motion sickness, nausea, and as a sedative. It works by blocking the effects of histamine in the body, which helps reduce allergic symptoms and nausea.
Key Features
- Available Strengths: Promethazine tablets are typically available in 10 mg, 25 mg, and 50 mg dosages.
- Formulation: The tablets are usually round and may be coated for easier swallowing.
Indications
Promethazine is indicated for:
- Allergic Reactions: Relief from symptoms such as sneezing, runny nose, and itching.
- Motion Sickness: Prevention and treatment of nausea and vomiting associated with motion sickness.
- Nausea and Vomiting: Effective for managing nausea related to surgery or other medical conditions.
- Sedation: Used as a sedative before surgery or for short-term sleep aid.
Dosage Instructions
- Adults:
- For allergies: Typically, 12.5 to 25 mg taken before meals and at bedtime.
- For motion sickness: Take 25 mg one hour before travel; may repeat every 6 to 8 hours as needed.
- For nausea: Usually, 25 mg every 4 to 6 hours as needed, not exceeding 100 mg per day.
- Children (2 years and older):
- Dosing is based on weight; generally, 0.5 to 1 mg/kg per day, divided into smaller doses. Maximum doses should not exceed adult recommendations.
Administration
- Take the tablets with or without food as directed by your healthcare provider.
- Swallow the tablet whole with a glass of water; do not crush or chew unless specified.
Side Effects
Common side effects may include:
- Drowsiness or sedation
- Dizziness or lightheadedness
- Dry mouth
- Blurred vision
Serious side effects can include:
- Severe allergic reactions (e.g., rash, swelling, difficulty breathing)
- Confusion or agitation
- Uncontrolled movements or tremors
- Jaundice (yellowing of the skin or eyes)
Precautions
- Contraindications: Not recommended for individuals with certain conditions such as severe asthma, respiratory issues, or hypersensitivity to promethazine.
- Use caution in elderly patients due to increased sensitivity to side effects.
- Consult a healthcare provider if pregnant or breastfeeding before use.
