Promethazine is a prescription first-generation antihistamine used to relieve symptoms of allergic conditions, including seasonal allergies, allergic conjunctivitis, and uncomplicated skin reactions such as hives. By blocking histamine receptors in the body, promethazine helps reduce itching, redness, watery eyes, runny nose, and other allergy-related discomforts.
In addition to its antihistamine effects, promethazine has sedative properties, which may also help improve rest during periods of severe allergy flare-ups. It is typically used for short-term symptom relief when other non-sedating antihistamines are not effective or appropriate.
Usage Instructions:
Take exactly as prescribed by your healthcare provider
May be taken with food, water, or milk to reduce gastrointestinal discomfort
Avoid alcohol while taking promethazine, as it can increase drowsiness
Follow dosing instructions carefully, as higher doses may increase side effects without added benefit
Warnings & Precautions:
May cause significant drowsiness; use caution when driving or operating machinery
Avoid alcohol and other sedating medications unless approved by your provider
Use with caution if you have glaucoma, lung disease, seizure disorders, or liver problems
Possible side effects include dry mouth, constipation, dizziness, and headache
Inform your healthcare provider if you are pregnant, breastfeeding, or taking other antihistamines or sedatives
Promethazine side effects may include fatigue, blurred vision, dry mouth, nausea, vomiting, trouble sleeping, constipation, urinary retention, dizziness, drowsiness.
This information should not be used to decide whether or not to take this medicine or any other medicine. Only a healthcare provider has the knowledge and training to decide which medicines are right for you. TelyRx does not endorse any medicine as safe, effective, or approved for treating any patient or health condition. This is only a limited summary of general information about the medicine’s uses from the patient education materials and is not intended to be comprehensive. This limited summary does NOT include all information about the possible uses, directions, warnings, precautions, interactions, adverse effects, or risks that may apply to this medicine. This information is not intended to provide medical advice, diagnosis or treatment and does not replace information you may receive from your healthcare provider. For a more detailed summary of information about the risks and benefits of using this medicine, please review the entire patient education information you receive with the medication.