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Benadryl Allergy Relief - 24 Capsules

Benadryl Allergy Relief - 24 Capsules

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  • ✔️ Relieves hay fever, hives, and allergic rhinitis symptoms effectively
  • ✔️ Fast-acting acrivastine works within approximately 30 minutes
  • ✔️ Non-drowsy formula suitable for daytime allergy relief
  • ✔️ Each pack contains 24 capsules for flexible, as-needed dosing
  • ✔️ Clinically proven second-generation antihistamine, available OTC

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What Are Benadryl Allergy Relief Capsules?

 

If you struggle with sneezing fits, a constantly runny nose, or itchy, watering eyes every time pollen season arrives, you are far from alone. Hay fever affects around one in five people in the UK, and allergic reactions to dust mites, pet dander, and mould can cause misery year-round. Benadryl Allergy Relief capsules offer a fast-acting, over-the-counter option that many people reach for when symptoms flare. Each pack contains 24 capsules, giving you a practical supply to keep at home or carry with you. You can browse the full range of antihistamines and related products in our allergy and hay fever collection.

The active ingredient is acrivastine 8 mg — a second-generation antihistamine that is classified as non-drowsy, though individual responses do vary. It is available without a prescription for adults and young people aged 12 to 65, making it one of the more accessible options for managing everyday allergic symptoms.

 

How Do Benadryl Allergy Relief Capsules Work?

 

Allergic reactions happen when your immune system overreacts to a harmless substance — pollen, for instance — and releases a chemical called histamine. Histamine binds to H1 receptors throughout the body, triggering the familiar cascade of sneezing, itching, and inflammation. Acrivastine works by competitively blocking those H1 receptors, reducing the allergic response before it takes hold.

  • Acrivastine is absorbed quickly from the gut, with symptom relief typically beginning within 30 minutes.
  • It has a relatively short half-life, so each dose lasts approximately 6 to 8 hours rather than a full 24 hours.
  • Because it crosses the blood-brain barrier less readily than older antihistamines, it causes less sedation — though it is not entirely free of that risk.
  • It does not require a loading period; it works on the first dose.

 

Who Should Use Benadryl Allergy Relief Capsules?

 

These capsules are suitable for a fairly broad group of adults, but they are not right for everyone. They are designed for people who need reliable, relatively fast symptom control without committing to a once-daily tablet that stays in the system all day. That said, always read the label carefully before you start.

  • Adults and young people aged 12 to 65 with hay fever or allergic rhinitis.
  • People experiencing urticaria (hives) or other skin-based allergic reactions.
  • Those who prefer a shorter-acting antihistamine they can take as needed rather than daily.
  • Individuals who have found longer-acting antihistamines cause unwanted drowsiness throughout the day.

 

How Do Benadryl Allergy Relief Capsules Compare to Other Antihistamines?

 

Feature Benadryl Allergy Relief (Acrivastine 8 mg) Cetirizine 10 mg
Active ingredient Acrivastine Cetirizine hydrochloride
Dosing frequency Up to 3 times daily Once daily
Duration of action 6–8 hours Up to 24 hours
Suitable age range 12–65 years 6 years and over (adult dose from 12)
Drowsiness risk Low (non-drowsy classification) Low (non-drowsy classification)

 

How Should You Store Benadryl Allergy Relief Capsules?

 

Store your Benadryl Allergy Relief capsules below 25°C in a dry place, away from direct sunlight. Keep them in the original blister packaging until you are ready to use them, and always keep medicines out of the reach and sight of children. Do not use the capsules after the expiry date printed on the pack — even if they look and smell fine, the active ingredient may have degraded.

If you are managing multiple allergy symptoms — for example, itchy eyes alongside nasal congestion — you might also want to explore our eye care collection for additional relief options. And remember: this product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

This product is a medicine. Speak to your doctor or pharmacist before using if you have an underlying medical condition or are taking other medicines.

Benadryl Allergy Relief 24 Capsules specifications
Treatment category Allergy / Hay fever
Active ingredient Acrivastine 8 mg
Mechanism of action H1 histamine receptor antagonist
Drug class Second-generation antihistamine
Preparation Capsule
Route of administration Oral
Pack size 24 capsules
Strengths 8 mg
UK classification Pharmacy (P) medicine
Suitable for Adults and young people aged 12–65
Effective for Hay fever, allergic rhinitis, urticaria

Specifications of Benadryl Allergy Relief 24 Capsules

 

What Is Benadryl Allergy Relief and What Is It Used For?

 

Benadryl Allergy Relief 24 Capsules contain acrivastine 8 mg per capsule. Acrivastine is a second-generation antihistamine used to relieve the symptoms of allergic conditions. It is licensed in the UK for the treatment of hay fever (seasonal allergic rhinitis), perennial allergic rhinitis, and urticaria (hives). It works by blocking the action of histamine — the chemical your body releases during an allergic reaction — at H1 receptor sites, reducing symptoms such as sneezing, itching, a runny nose, and skin reactions.

These capsules are an over-the-counter (OTC) Pharmacy medicine, meaning you can buy them without a prescription but they should be purchased from a registered pharmacy. If your allergy symptoms are severe, persistent, or accompanied by other health concerns, it is always worth speaking to your GP or pharmacist for personalised advice.

 

What Do You Need to Know Before Using Benadryl Allergy Relief?

 

Before taking these capsules, read the following carefully. There are specific groups of people for whom acrivastine is not appropriate.

Do not take Benadryl Allergy Relief if you:

  • Are allergic to acrivastine, triprolidine, or any other ingredient in the capsule.
  • Are under 12 years of age or over 65 years of age.
  • Have severe kidney impairment.
  • Are taking monoamine oxidase inhibitors (MAOIs) or have taken them within the last 14 days.
  • Are pregnant or breastfeeding, unless advised by a doctor.

Drug interactions — tell your pharmacist if you are taking:

  • Sedatives, sleeping tablets, or anxiolytics — combined sedative effects may increase.
  • Alcohol — this can enhance any drowsiness caused by acrivastine.
  • Other antihistamines — avoid taking more than one antihistamine at the same time.
  • MAOIs — a potentially serious interaction; do not combine.

 

How Should You Use Benadryl Allergy Relief?

 

Always use this medicine exactly as described in the patient information leaflet or as directed by your pharmacist. Do not exceed the stated dose.

  1. Swallow one capsule whole with a glass of water.
  2. Do not chew or open the capsule.
  3. You may take the capsule with or without food.
  4. Repeat after 6 to 8 hours if symptoms return, up to a maximum of three capsules in 24 hours.
  5. Do not take more than three capsules in any 24-hour period.
Indication Age Group Dose Frequency
Hay fever / allergic rhinitis 12–65 years 1 capsule (8 mg) Up to 3 times daily
Urticaria (hives) 12–65 years 1 capsule (8 mg) Up to 3 times daily
Under 12 or over 65 Not suitable

 

What Are the Possible Side Effects of Benadryl Allergy Relief?

 

Like all medicines, acrivastine can cause side effects, although not everyone experiences them. If you are concerned about any reaction, stop taking the capsules and speak to your pharmacist or GP.

Common side effects (may affect up to 1 in 10 people):

  • Drowsiness or sedation
  • Dry mouth
  • Headache
  • Dizziness

Less common side effects (may affect up to 1 in 100 people):

  • Nausea
  • Difficulty concentrating
  • Skin rash or hypersensitivity reactions
  • Palpitations

Rarely, acrivastine can cause a serious allergic reaction (anaphylaxis). Seek emergency medical help immediately if you develop swelling of the face, lips, or throat, difficulty breathing, or a sudden drop in blood pressure. If you are managing skin-related allergy symptoms alongside your hay fever, our skin care collection includes products that may help soothe irritated skin.

 

How Should You Store Benadryl Allergy Relief?

 

  • Store below 25°C in a dry place away from direct heat and sunlight.
  • Keep in the original blister packaging until use.
  • Keep out of the reach and sight of children.
  • Do not use after the expiry date printed on the pack.
  • Do not dispose of medicines via wastewater or household waste — return unused capsules to your pharmacy for safe disposal.

If you find yourself needing additional support for sleep disrupted by allergy symptoms, it may be worth exploring our sleep aid collection for suitable options — though always check with your pharmacist before combining products.

Written and reviewed by our qualified team

Your safety and success are our highest priorities. Our medical team rigorously evaluates every product and piece of advice we provide, ensuring you receive only the most effective, science-backed solutions available.

Frequently Asked Questions

Where can I buy Benadryl Allergy Relief capsules online in the UK?

You can buy Benadryl Allergy Relief 24 Capsules directly from Cured Pharmacy, a GPhC-registered online pharmacy. Simply add the product to your basket and complete your order for fast UK delivery. You can also browse our full allergy and hay fever collection for related products.

How do Benadryl Allergy Relief capsules work in the body?

Each capsule contains acrivastine 8 mg, which blocks H1 histamine receptors throughout the body. When histamine is prevented from binding to these receptors, the allergic response — sneezing, itching, runny nose — is significantly reduced. The effect begins within approximately 30 minutes of taking a capsule and lasts around 6 to 8 hours.

How quickly do Benadryl Allergy Relief capsules start working?

Acrivastine is absorbed rapidly from the gastrointestinal tract, and most people notice symptom relief within 30 minutes of taking a capsule. This makes it a useful option when you need relatively quick relief from hay fever or hives. The effect typically lasts 6 to 8 hours, after which you can take another capsule if needed.

What is the correct dose of Benadryl Allergy Relief for adults?

The recommended dose for adults and young people aged 12 to 65 is one 8 mg capsule, taken up to three times daily. You should leave at least 6 hours between doses and must not exceed three capsules in any 24-hour period. If your symptoms are not controlled at this dose, speak to your pharmacist or GP rather than increasing the dose yourself.

Can I take Benadryl Allergy Relief capsules if I am pregnant or breastfeeding?

Acrivastine is not routinely recommended during pregnancy or breastfeeding. You should always speak to your doctor or pharmacist before taking any medicine during pregnancy, as they can advise on the safest option for your individual circumstances. There are alternative antihistamines that may be considered more appropriate during pregnancy, such as loratadine, but this decision should be made with a healthcare professional.

Are Benadryl Allergy Relief capsules suitable for children?

No — Benadryl Allergy Relief capsules are not suitable for children under 12 years of age. They are also not recommended for adults over 65 due to the increased risk of side effects in older people. If you need allergy relief for a younger child, speak to your pharmacist about age-appropriate alternatives.

Can I drive after taking Benadryl Allergy Relief capsules?

Acrivastine is classified as a non-drowsy antihistamine, but it can still cause drowsiness in some individuals. You should not drive or operate heavy machinery if you feel at all sleepy or impaired after taking a capsule. Combining acrivastine with alcohol significantly increases the risk of sedation, so avoid alcohol while taking this medicine.

What are the side effects of Benadryl Allergy Relief capsules?

The most commonly reported side effects include drowsiness, dry mouth, headache, and dizziness. Less commonly, some people experience nausea, difficulty concentrating, or skin reactions. Rarely, a serious allergic reaction can occur — if you develop swelling of the face or throat, or difficulty breathing, seek emergency medical help immediately.

How do I manage drowsiness caused by Benadryl Allergy Relief capsules?

If you find that acrivastine makes you drowsy, try taking your dose in the evening when sedation is less likely to interfere with your daily activities. Avoid alcohol entirely while taking these capsules, as it can worsen drowsiness. If sedation remains a problem, speak to your pharmacist — they may suggest an alternative antihistamine that suits you better.

What happens if I miss a dose of Benadryl Allergy Relief?

If you miss a dose, simply take the next capsule when your symptoms return or when your next scheduled dose is due — whichever comes first. Do not double up by taking two capsules at once to make up for a missed dose. Because acrivastine is taken as needed rather than as a strict daily regimen, missing a dose is generally not a clinical concern.

Can I take Benadryl Allergy Relief capsules with other medicines?

You should not take acrivastine alongside MAOIs, other antihistamines, sedatives, or sleeping tablets without first speaking to your pharmacist. Combining acrivastine with alcohol or sedative medicines can increase the risk of drowsiness and impaired reactions. Always tell your pharmacist about all medicines, supplements, and herbal remedies you are currently taking.

How do Benadryl Allergy Relief capsules compare to cetirizine or loratadine?

All three are second-generation antihistamines, but they differ in duration of action and dosing. Cetirizine and loratadine are taken once daily and last up to 24 hours, while acrivastine lasts 6 to 8 hours and is taken up to three times daily. Some people prefer acrivastine's shorter action because it gives them more control over when they take it, particularly if they only need relief at certain times of day.

How long can I take Benadryl Allergy Relief capsules for?

Benadryl Allergy Relief capsules can be used for short-term relief of allergy symptoms. If you find you need to take them continuously for more than a few weeks, it is worth speaking to your GP or pharmacist to review your allergy management plan. Long-term use without medical review is not generally recommended for any OTC antihistamine.

What are the alternatives to Benadryl Allergy Relief capsules?

Common alternatives include cetirizine 10 mg tablets, loratadine 10 mg tablets, and fexofenadine 120 mg tablets — all available OTC in the UK. Nasal corticosteroid sprays such as fluticasone are also highly effective for allergic rhinitis and are recommended by the NHS for persistent hay fever symptoms. Your pharmacist can help you choose the most suitable option based on your symptoms and medical history.

Is there any new research on acrivastine for allergy treatment?

Acrivastine has been used clinically for several decades and its safety and efficacy profile is well established. Current NHS and NICE guidance continues to support second-generation antihistamines like acrivastine as first-line treatment for allergic rhinitis and urticaria. Research interest has largely shifted towards immunotherapy and biologics for severe allergic disease, but acrivastine remains a reliable and well-tolerated OTC option for mild to moderate symptoms.

How Should You Use Benadryl Allergy Relief Capsules?

Using Benadryl Allergy Relief capsules correctly ensures you get the most from each dose while minimising the risk of side effects. Always read the patient information leaflet supplied with the pack before you start, and follow these steps carefully.

What Is the Correct Dose of Benadryl Allergy Relief Capsules?

The dose is the same whether you are treating hay fever, allergic rhinitis, or urticaria. There is no separate loading dose — the standard dose applies from the very first capsule you take.

When Is the Best Time to Use Benadryl Allergy Relief Capsules?

Because acrivastine begins working within approximately 30 minutes, it is most effective when taken shortly before you expect to encounter your allergy trigger — for example, before going outdoors during high pollen periods. If your symptoms are unpredictable, take a capsule as soon as they begin rather than waiting for them to worsen. Spacing your doses evenly throughout the day — for instance, morning, afternoon, and evening — helps maintain consistent symptom control if you need all three daily doses.

Avoid taking your final dose too close to bedtime if you are sensitive to any stimulant effects, though most people find acrivastine does not disrupt sleep at standard doses.

How Long Can You Use Benadryl Allergy Relief Capsules For?

These capsules are suitable for short-term use during periods when your allergy symptoms are active. Many people use them seasonally during the hay fever season, which in the UK typically runs from late March through to September depending on the pollen type. If you find you need to take acrivastine continuously for longer than a few weeks, or if your symptoms are not adequately controlled, speak to your GP or pharmacist. They can review your allergy management and discuss whether a different treatment approach — such as a nasal corticosteroid spray or immunotherapy — might be more appropriate for you.

Do not exceed the recommended dose. If in doubt, speak to your pharmacist.

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What Are the Most Common Side Effects of Benadryl Allergy Relief Capsules?

Although acrivastine is classified as a non-drowsy antihistamine, it can still cause side effects in some people. Common side effects are generally mild and often resolve on their own as your body adjusts to the medicine.

  • Drowsiness or sedation
  • Dry mouth
  • Headache
  • Dizziness

If drowsiness is affecting your daily activities, try taking your dose in the evening or speak to your pharmacist about an alternative antihistamine that may suit you better.

What Are the Less Common Side Effects of Benadryl Allergy Relief Capsules?

Less commonly, some people experience side effects that are more noticeable but still generally manageable. These affect fewer than 1 in 100 people taking acrivastine.

  • Nausea or stomach discomfort
  • Difficulty concentrating or feeling mentally foggy
  • Skin rash or mild hypersensitivity reaction
  • Palpitations (awareness of your heartbeat)
  • Blurred vision

If any of these persist or become troublesome, stop taking the capsules and consult your pharmacist or GP.

What Are the Serious Side Effects of Benadryl Allergy Relief Capsules?

Serious side effects from acrivastine are rare, but they do require immediate medical attention if they occur. The most significant risk is a severe allergic reaction (anaphylaxis), which — though uncommon — can happen with any medicine, including antihistamines.

Seek emergency medical help immediately (call 999) if you experience any of the following after taking a capsule:

  • Sudden swelling of the face, lips, tongue, or throat
  • Difficulty breathing or swallowing
  • A sudden drop in blood pressure causing faintness or collapse
  • Severe skin reactions such as widespread blistering or peeling

What Should You Do If You Experience Side Effects?

For mild side effects such as a dry mouth or headache, these often improve without any action needed. Staying well hydrated and avoiding alcohol can help reduce their severity. If you experience drowsiness, do not drive or operate machinery until you feel fully alert again.

For any side effect that concerns you, or that does not improve within a day or two, contact your pharmacist or GP. You can also report suspected side effects directly to the MHRA via the Yellow Card scheme at yellowcard.mhra.gov.uk. This helps regulators monitor the safety of medicines in real-world use.

Can Benadryl Allergy Relief Capsules Interact With Other Medicines?

Yes — acrivastine can interact with several other medicines and substances. The most clinically significant interactions include monoamine oxidase inhibitors (MAOIs), which must not be taken within 14 days of acrivastine. Combining acrivastine with sedatives, sleeping tablets, anxiolytics, or alcohol can increase the risk of drowsiness and impaired coordination. Taking more than one antihistamine at the same time is not recommended and offers no additional benefit while increasing the risk of side effects.

Always tell your pharmacist about every medicine, supplement, or herbal remedy you are currently taking before starting Benadryl Allergy Relief capsules.

If you are concerned about any side effects, contact your pharmacist or GP immediately.

Patient Information Leaflet

Important - Before taking any medication, it is always important to read the Patient Information Leaflet (PIL)

Written and reviewed by our qualified team

GPhC Number: 2233073
Tarun Kumar

Reviewed by:

Tarun Kumar

Superintendent/ Clinical Lead

📖 Find out more about our team of medical content authors and how we ensure the accuracy of our content with our content guidelines.

Content last updated: 31 Mar 2025

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