Phenergan, also known by its generic name promethazine, is a medication used to treat a variety of conditions such as allergies, motion sickness, and nausea and vomiting. It belongs to a class of drugs called phenothiazines, which work by blocking certain natural substances in the body. Phenergan is available in tablet, suppository, and syrup forms, and it may also be used as a sedative or sleep aid in some cases.

Price of Phenergan

Phenergan has a price point ranging from £0.31 to £0.43 per pills. Variations in price are linked to the pack’s dimension and the active ingredient dosage (60 or 360 mg).

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Phenergan is a medication that belongs to the class of phenothiazine antihistamines. It is primarily used to treat various allergies, motion sickness, and nausea and vomiting caused by certain medical conditions or medications. The drug works by blocking the action of histamine, a substance that is released during an allergic reaction. Phenergan is available in both oral tablet and liquid form, as well as in injectable form for intramuscular or intravenous administration.

When Not to Take Phenergan

Phenergan should not be taken by individuals who have a known hypersensitivity or allergy to the active ingredient, promethazine, or any other components of the medication. It is also contraindicated in patients who have recently used a monoamine oxidase inhibitor (MAOI), as the combination may result in potentially serious interactions. Additionally, Phenergan should be avoided in individuals with certain medical conditions, such as respiratory depression, asthma, narrow-angle glaucoma, and certain gastrointestinal obstructions. It is important to consult with a healthcare professional before using Phenergan to determine if it is safe and appropriate for you.

Adverse Reactions

Like any medication, Phenergan can cause certain side effects. Common adverse reactions may include drowsiness, dizziness, dry mouth, blurred vision, constipation, and urinary retention. These side effects are generally mild and transient, but if they persist or worsen, it is important to seek medical attention. In rare cases, Phenergan can cause more serious side effects, such as respiratory depression, severe dizziness, severe drowsiness, and seizures. If any of these severe side effects occur, medical help should be sought immediately.

Dosage Guide

The dosage of Phenergan varies depending on the intended use and individual factors, such as age, weight, and medical condition. It is important to follow the instructions provided by the healthcare professional or the medication label. For the treatment of allergies and motion sickness, the usual adult dose is 25 mg taken orally or rectally. In certain cases, a higher dose of up to 50 mg may be prescribed. Pediatric dosages are calculated based on weight and should be determined by a healthcare professional. If a dose is missed, it should be taken as soon as remembered unless it is close to the next scheduled dose. Taking a double dose to make up for a missed dose should be avoided. An overdose of Phenergan can cause serious symptoms, such as hallucinations, delirium, seizures, and even coma. In case of an overdose, immediate medical attention is necessary.

Interactions Guide

Phenergan may interact with other medications, leading to potentially adverse effects or decreasing the efficacy of one or both drugs. It is important to inform the healthcare professional about all current medications, including prescription, over-the-counter, and herbal products, before starting Phenergan. Phenergan should not be used concomitantly with other CNS depressants, such as barbiturates, opioids, or benzodiazepines, as it may enhance the sedative effects. Additionally, the use of Phenergan with certain medications, such as anticholinergic drugs, can increase the risk of side effects. This is not an exhaustive list of drug interactions, and it is essential to consult with a healthcare professional for a comprehensive evaluation of potential drug interactions.


  • Can Phenergan be used during pregnancy?

    Phenergan should be used during pregnancy only if the potential benefits outweigh the potential risks. It is recommended to consult with a healthcare professional for individualized guidance.

  • Is Phenergan safe for children?

    Phenergan can be used in children, but the dosage should be carefully determined by a healthcare professional based on the child’s age and weight.

  • Does Phenergan cause drowsiness?

    Yes, drowsiness is a common side effect of Phenergan. It is important to avoid activities that require mental alertness, such as driving, while under the influence of Phenergan.

  • Can Phenergan be used for motion sickness?

    Yes, Phenergan is commonly used to prevent and relieve motion sickness. It works by blocking signals in the brain that trigger nausea and vomiting.

  • Can Phenergan be taken with food?

    Phenergan can be taken with or without food. Taking it with food may help reduce stomach upset.



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