Acrivastine

What is acrivastine?

Acrivastine is a fast-acting, non-drowsy antihistamine used to relieve symptoms caused by allergies such as hay fever, hives, and insect bites. It is commonly available over the counter in shops and pharmacies under brand names like Benadryl Allergy Relief. Acrivastine begins to work quickly usually within 15 to 30 minutes – and is often taken as needed rather than regularly[1]. 

What is acrivastine used to treat?

This medicine is typically used to relieve symptoms caused by[1]: 

• Hay fever (seasonal allergic rhinitis) 

• Hives (urticaria) 

• Allergies to dust mites, pets, or mould 

• Skin reactions caused by insect bites or stings 

How does acrivastine work?

Acrivastine is an antihistamine that works by blocking the effects of histamine, a substance your body produces during an allergic reaction. This helps reduce symptoms such as[1]: 

• Sneezing 

• Runny or blocked nose 

• Watery or itchy eyes 

• Skin itching and rashes 

Who can take acrivastine?

Acrivastine is generally suitable for adults and children aged 12 years and older. However, you should speak to a doctor if you: 

• Have kidney problems 

• Have porphyria 

• Are due to have an allergy test 

• Are pregnant or breastfeeding 

• Are allergic to acrivastine  

Please tell your doctor or pharmacist about any conditions you may have or medication you take before you start treatment, and always follow the instructions in the Patient Information Leaflet[2].  

What is the typical dosage of acrivastine?

Acrivastine comes in 8mg capsules. When mixed with a decongestant, each capsule contains 8mg of acrivastine and 60mg of pseudoephedrine. The usual dose of each is[1]: 

• 1 capsule up to three times in 24 hours 

• Capsules should be spaced evenly throughout the day 

• Do not take more than 3 capsules in a day 

How do you take acrivastine?

Take acrivastine with water, swallowing the capsule whole. It can be taken with or without food. It is usually taken as needed such as when you have an insect bite, or to prevent symptoms such as with hayfever[1]. 

Can you stop taking acrivastine?

Yes, you can stop taking acrivastine at any time. Since it is taken only when needed, there is no need for gradual withdrawal. Stop as soon as your symptoms improve or allergy triggers such as pollen are no longer present[1]. 

What do you do if you forget to take acrivastine

If you forget to take a dose: 

• Skip it if your symptoms are under control 

• Take a dose only if you need it, and be sure not to exceed the daily maximum 

• Never double up on doses to make up for a missed one 

What do you do if you forget to take remdesivir?

If you forget to take a dose: 

• Skip it if your symptoms are under control 

• Take a dose only if you need it, and be sure not to exceed the daily maximum 

• Never double up on doses to make up for a missed one 

How do you store acrivastine?

Storage is handled by hospital pharmacies under controlled conditions. The medicine is prepared just before it is given to you and is not kept at home[1]. 

What medicines can’t you take with acrivastine?

Acrivastine can interact with some other medicines, particularly when mixed with pseudoephedrine. Check with your pharmacist or doctor before combining it with[1]: 

• Other antihistamines (risk of overdose or increased side effects) 

• Sedatives or sleeping pills (may increase drowsiness) 

• Alcohol (can make side effects like drowsiness worse) 

• Certain antibiotics (e.g., erythromycin) or antifungal medications that affect the way your body processes acrivastine 

Always inform your doctor or pharmacist about all medications and supplements you take before you start a new medicine, and follow the instructions in the Patient Information Leaflet[2]. 

What are the side effects of acrivastine?

Most people tolerate acrivastine well, but common side effects can include[1]: 

• Headache 

• Mild drowsiness (less common than with older antihistamines) 

• Dry mouth 

Rare but serious side effects include[1]: 

• Fast or irregular heartbeat 

• Allergic reactions such as rash, swelling, or difficulty breathing 

You should contact your GP if you experience any of these symptoms. In rare cases, the medicine may cause a serious allergic reaction (anaphylaxis). You should call 999 or visit A&E immediately if you believe this is happening[1]. 

Symptoms of anaphylaxis include[1]:  

• Difficulty breathing  

• Tightness in throat and chest  

• Swelling of the tongue or throat  

• Feeling faint or dizzy  

• Blue/grey skin or lips  

• Loss of consciousness 

If you experience any side effects, including those not listed, you are encouraged to report them via the Yellow Card Scheme or contact your doctor, pharmacist, or nurse. This information is intended as a summary for general awareness and does not replace professional medical advice. 

The information provided in the side effects section is not a comprehensive list of all possible side effects associated with this medication. For a complete list of side effects, please refer to the Patient Information Leaflet (PIL) provided with your medication or consult your healthcare professional[2]. 

Frequently asked questions about acrivastine

How quickly does acrivastine work? 
Most people feel relief within 15 to 30 minutes after taking a dose[1]. 

Can I take acrivastine every day? 
Yes, you can take up to three capsules a day, but only when needed and not more than one at a time, three times each day[1]. 

Does it make you drowsy? 
It is less likely to cause drowsiness than older antihistamines, but some people may still feel sleepy[1]. 

Can children take it? 
Only children aged 12 and over should take acrivastine[1]. 

Can I take acrivastine with alcohol? 
It’s best to avoid alcohol, as it can increase the risk of drowsiness[1]. 

Is it safe in pregnancy? 
It is not usually recommended during pregnancy or breastfeeding – check with your pharmacist or doctor[1]. 

Can I drive after taking acrivastine? 
Yes, unless you feel drowsy or dizzy[1]. 

Can I take it with other allergy medications? 
Avoid combining it with other antihistamines unless advised by your doctor[1]. 

For the official NHS guide to acrivastine, visit their website.