Phenergan Dosage Strengths and Administration
Available Phenergan Strengths at EverydayMeds
EverydayMeds offers two main Phenergan formulations to suit different needs. The Phenergan 25mg tablets provide a convenient, pre-measured dose ideal for adults requiring standard-strength treatment. Our 56-tablet pack offers good value for short-term courses. The Phenergan 5mg/5ml elixir in 100ml bottles allows for more flexible dosing, particularly useful when smaller amounts are needed or swallowing tablets is difficult.
Dosage Guidelines by Condition
For sleep difficulties, adults typically take 25-50mg (1-2 tablets or 25-50ml elixir) at bedtime. This higher dose range utilises promethazine's sedating properties. For allergic conditions like hay fever, 25mg at night or 10-20mg 2-3 times daily may be appropriate. The night-time dose helps manage symptoms whilst minimising daytime drowsiness. Motion sickness prevention usually involves 25mg the evening before travel, followed by 25mg on the morning of departure.
Administration and Timing Considerations
Phenergan tablets should be taken with water and can be consumed with or without food. The elixir can be measured using the provided spoon or oral syringe for accuracy. When used for sleep, take 30-60 minutes before bedtime to allow absorption. For allergies, evening doses are often preferred due to the medication's sedating effects. Daytime drowsiness may occur, so avoid driving or operating machinery until you know how Phenergan affects you.
Duration and Safety Guidelines
Phenergan for sleep should only be used short-term, typically 2-7 days maximum, as tolerance can develop quickly. For allergic conditions, treatment duration depends on symptom persistence but regular review is important. Both tablet and elixir forms are equally effective - choice depends on personal preference and dosing requirements. Always follow the patient information leaflet and consult healthcare professionals if symptoms persist or worsen during treatment.




