Tavegil pills are a medication used for the treatment of allergies. These pills help to prevent and reduce the impact of allergic reactions using the active ingredient clemastine. More information

A doctor will review your order and write you a prescription, if appropriate. This prescription is then forwarded to a pharmacy. The pharmacy will have your medicine delivered to you within one to three working days. Read more about this process here.

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Patient Leaflet(s)

Tavegil tablets are a form of allergy medication or a sedating antihistamine. These pills contain the active ingredient Clemastine, which is a form of medication that works to prevent the activities of histamine in the bloodstream, keeping allergic reactions to a minimum.  

What is Tavegil? 

Tavegil pills are a medication used for the treatment of allergies. These pills help to prevent and reduce the impact of allergic reactions using the active ingredient clemastine. The ingredient clemastine is a sedating antihistamine which prevents the actions of histamine, a substance in the body that works to protect you from allergens.  

Histamine is stored in virtually all tissues of the body. It reacts when your body is exposed to a foreign substance, such as dust or pollen. Histamine binds to certain receptors in the body, causing an increase in blood flow to that area, along with a chain reaction of allergic symptoms. All of this results in things like a runny nose, inflammation of the eyes, and even trouble with the airways.  

Histamine can also cause rashes, itching, and swelling in the skin, depending on the kind of foreign body that it is responding to. By preventing the reaction of histamine from taking place, Tavegil helps to eliminate some of the symptoms associated with an allergic reaction.  

When is Tavegil used? 

Tavegil is intended as a treatment to help prevent or reduce the risk of allergic reactions. It cannot protect the body in the case of a severe and sudden allergic reaction. In that case, you will require emergency medical attention. Tavegil works by blocking the histamine receptors in your body. It does not stop histamine from being released, but instead stops that substance from binding to receptors, which prevents the release of other allergy chemicals.  

Tavegil is a kind of sedating antihistamine. This means that it enters your brain in more significant quantities than a non-sedating antihistamine. Because of this, Tavegil may cause drowsiness. This feature makes Tavegil quite useful for relieving itching caused by chickenpox and eczema, however.  

Your doctor will usually only recommend using Tavegil if you suffer regularly from constant exposure to allergens. If you simply have some occasional allergic reactions to things like pollen during certain parts of the year, a different kind of treatment may be considered.  

How do you use Tavegil? 

When your doctor prescribes Tavegil for the treatment of your allergies, they will provide you with information on how to use and store this medication properly. It's important to follow these instructions carefully, as misusing Tavegil could mean that you don't get the best outcomes from the medication. Before you begin using this treatment, read through the information included in the patient leaflet within the packaging.  

The manufacturer's leaflet included with your medication will provide guidance into the way that Tavegil works, and the kind of side effects that you might experience when taking it. It is important to take Tavegil exactly as you are instructed to do so by your doctor or pharmacist. You will be able to swallow this medication with water or without before or after meals each day. Importantly, you might find that you're less likely to have gastrointestinal issues if you take Tavegil with a meal.  

It's best to take Tavegil at the same time each day, so you remember to use it regularly. This is a form of long-term treatment intended to protect you against various forms of allergen. If you forget to take a dose of Tavegil, just take the next dose when it is due and continue as normal. It is important not to take a double dose of Tavegil to make up for a missed pill. Most people will only need to use this medication for a short period of time, until their symptoms have eased.  

What dosages are available? 

It is important not to take more or less Tavegil than your doctor recommends. You will be given a dose of medication based on your condition and medical history. Some doctors may start you on a lower dose of a medication to see how well you respond to the substance before moving you to a higher dose. Unless your doctor advises otherwise, the most common dose for Tavegil is one tablet of 1mg taken twice each day for an adult. Usually, it's best to space these doses out by taking one on a morning and one on the evening.  

What are the side effects of Tavegil? 

Many medications, including Tavegil can come with side effects that may cause discomfort for some people. Although it is possible to take these pills without any negative repercussions, Tavegil can cause side effects for different people depending on how their body reacts to the active ingredients. Keep in mind that just because we mention a side effect here, doesn't mean that you will experience it.  

Additionally, it is possible that you may notice symptoms after taking Tavegil that are not listed here, or in the medication leaflet. If that happens, seek guidance from your doctor or pharmacist.  

Common side effects like drowsiness or fatigue will happen after taking Tavegil for most people, however, you can avoid this by taking the medication closer to the evening when possible. Some people will also experience dizziness or lightheadedness after taking Tavegil.  

Speak to your doctor if you encounter some of the more rare side effects associated with Tavegil, such as headaches, disturbances in the stomach, dry mouth, skin rash, nausea, excitability, shortness of breath, loss of strength or weakness. In very rare cases, for between 1 and 10,000 people, it's possible to have issues like an increased heart rate, palpitations of the heart, and constipation.  

An allergic reaction to Tavegil is very rare. However, if you notice anything that may indicate the presence of an allergic reaction, including sudden swelling in the mouth, tongue, or throat, dizziness, or trouble breathing, contact an emergency health professional immediately.  

When shouldn't you use Tavegil? 

Your doctor will need to discuss your condition with you in depth to determine whether Tavegil is right for you. Not everyone will be well suited to this substance. It is a good idea to use Tavegil in caution with people who are elderly or have ever experienced any kind of liver disease. Your doctor will want to assess you more regularly and keep an eye on your condition if you have an enlarged prostate gland, trouble passing urine, or you've ever had issues with an obstruction in the gut.  

You may also need to take more caution when using Tavegil if you have raised pressure in your eye, or a history of epilepsy.  

Tavegil can not be used by children under one year of age, or by people with a blood disorder known as porphyria. Tavegil tablets also contain lactase, which means that they should not be taken by people who struggle to absorb this substance. 

Do not take Tavegil if you are allergic to any of its active or inactive ingredient. You will need to make sure that it is safe to take Tavegil if you are pregnant or considering getting pregnant. The safety of this medication has not been fully established for people during pregnancy at this time. Your doctor may recommend using another form of treatment if necessary.  

Does Tavegil interact with any other medications? 

Drug interactions can be very dangerous and may increase your risk of suffering from severe side effects as a result of taking Tavegil. It is important to discuss all products or substances you're using alongside Tavegil with your doctor before you begin using this medication. This includes over-the-counter medications and substances that you have on a repeat prescription. Tell your doctor before taking any new medications with Tavegil, including supplements and herbal remedies.  

Tavegil can cause drowsiness. Your risk of experiencing this side effect is heightened if you are using other substances that cause drowsiness, such as other sedating antihistamines, barbiturates, antipsychotics, and sleeping tablets.  

Tavegil may not be suitable to take alongside tricylic antidepressants, opioid painkillers, and MAIO antidepressants. Tavegil might cause higher or more frequent problems with things like trouble passing urine, constipation, confusion, or dry mouth when taken with medications that are known for their anticholinergic effects, such as Parkinson's medications like procyclidine, or medications for urinary incontinence like oxybutynin. 

Where can you buy Tavegil? 

Tavegil is available to buy from most online and offline pharmacies. You can purchase this medication from your local pharmacy or arrange for us to deliver it to a local EU pharmacy on your behalf. Speak to a doctor before using this medication. We can arrange for a consultation with an EU doctor for you when you purchase a prescription medication like Tavegil.  

Can you get Tavegil without a prescription?  

It is not safe to purchase or take Tavegil without a prescription. This medication will not be suitable for all patients, and your doctor will need to assess your condition before prescribing this drug. If Tavegil is not suitable for you, a different medication may be suggested instead.


Steward, M. and Dajani, S. (2018). Clemastine tablets. Retrieved on August 27, 2019 from https://patient.info/medicine/clemastine-tablets-tavegil

Tavegil tablets. (2019). Retrieved on August 27, 2019 from https://www.medicines.org.uk/emc/product/6333/smpc

Tavegil tablets. (2019). [leaflet]. Retrieved from August 27, 2019 from https://www.drugs.com/uk/pdf/leaflet/1058123.pdf

Assessed by:

Dr Imran Malik, General practitioner
Registration number: GMC: 4741365

Dr Imran Malik studied undergraduate medicine at King's College University in Central London and clinical studies at the prestigious King's College Hospital. He graduated with a MBBS degree in 2000 and went on to gain postgraduate memberships with the Royal Society of Medicine and also General Practice in 2006.