Tykerb 250 mg
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Tykerb 250 mg


Tykerb 250 mg contains Lapatinib as an active ingredient. This medicine is used to treat breast cancer. Physicians may prescribe this medicine for other purposes not listed in this document.

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A tablet that is commonly used to prevent the growth of estrogen-dependent breast cancer in postmenopausal women. This drug may be used alongside other cancer medicines or surgery. Tykerb 250 mg works by reducing the amount of estrogen that the body produces. While the active ingredient is Lapatinib, it also contains other inactive ingredients such as silica, colloidal anhydrous, magnesium stearate, povidone, lactose monohydrate, and others. Tykerb 250 mg belongs to the class of medicines called aromatase inhibitors. In any case, do not use Tykerb 250 mg without the doctor’s prescription because you may experience unwanted results.

The manufacturer of Tykerb 250 mg is Novartis Ltd.

How to Administer Tykerb 250 mg?

Take this medicine by mouth with a glass full of water preferably on an empty stomach. While swallowing, you should not crush, break, or chew the tablet. Other beverages such as alcohol are not allowed to swallow the tablet because it may increase your risk of adverse effects. Commonly, the recommended dose per day is one tablet. Using this medicine more often than is prescribed will not improve your condition faster. However, your doctor may increase the dosage for several weeks, if you do not notice the desired result. If stomach upset or nausea occurs, you can take the pill with milk or light food. Use Tykerb 250 mg regularly such as at a fixed time every day, to get a better effect from this medicine.

Measure the dose carefully with a special spoon, in case you are using the liquid form of this medicine. It is not advised to use a household spoon because you may get the wrong dose. Inform your doctor if your health condition does not improve or if it worsens.


However, the dosages are different among patients. It depends on your age, response to treatment, the severity of your health condition, and other medicines that you may be using. Talk to a doctor if you are not sure what dosage is better for you. In addition, you should not stop the treatment suddenly without the doctor’s approval because symptoms may return and your condition may become difficult to treat.

  • Tykerb 250 mg

Missed Dose

In case you miss a dose, you should take it as soon as possible. If it is too close to the time for the next dose, simply skip the missed dose and continue the regular schedule as prescribed. If you are administering an increased dose of Lapatinib, trying to catch up, you may experience severe side effects.


Rarely, if you take more tablets than your doctor prescribes, you may notice an overdose. Examples include trouble breathing, severe dizziness, fainting, and others. If you experience any of the symptoms listed above, it is advised to interrupt using Tykerb 250 mg and consult a doctor at once. Ask your doctor if you have any questions.

Side Effects of Tykerb 250 mg

Tykerb 250 mg like other drugs may give you certain side effects. However, if your body adjusts to Lapatinib, you may not notice any of the following adverse reactions. Overdose and allergy are some factors that can provoke side effects. There are three types of adverse effects: mild, moderate, and severe.

Mild Side Effects

Commonly, most patients ignore this category of side effects but it is recommended to tell your doctor in case you notice any of the following negative effects. Your healthcare professional may help you to prevent or avoid side effects. Check below some examples:

Moderate Side Effects

In case patients experience any of the following side effects, they can continue the treatment safely. For example:

  • Muscle cramps
  • Lightheadedness
  • Dizziness
  • Constipation
  • Vomiting
  • Unusual thirst

Severe Side Effects

You may rarely experience this category of side effects. However, it is advised to stop taking Tykerb 250 mg and get medical help immediately. Additionally, your doctor may help you to prevent or avoid side effects. Check below some examples:

  • Reduced hearing
  • Deafness
  • Irregular heartbeat
  • Fainting
  • Confusion
  • Extreme fatigue
  • Change in the amount of urine

If you experience any of the side effects listed above or both of them at the same time, consult a doctor immediately.

Drug Interaction

There are some drugs and substances that may interact with Tykerb 250 mg. Therefore, other medicines may increase the risk of negative effects or decrease the effectiveness of Lapatinib. That’s why you should inform your doctor about all products that you are using before taking Tykerb 250 mg. For example supplements, herbal products, vitamins, prescription drugs, nonprescription drugs, and others. Check some examples below:

  • Ibuprofen
  • Lithium
  • Desmopressin
  • Naproxen
  • Ziprasidone
  • Tobramycin
  • Streptomycin
  • Pimozide
  • Droperidol
  • Dronedarone
  • Dofetilide
  • Aminolevulinic acid
  • Warfarin
  • Alprazolam
  • Digoxin
  • Thioridazine
  • Rasagiline
  • Riociguat
  • Quetiapine
  • Phenobarbital
  • Phenelzine
  • Prednisolone
  • Ozanimod
  • Piroxicam
  • Hydrochlorothiazide
  • Heroin
  • Glycerin
  • Fluoxetine
  • Ethanol
  • Efavirenz
  • Dexamethasone
  • Diclofenac
  • Codeine
  • Erectile dysfunction medicines (such as Sildenafil Citrate, Tadalafil, Avanafil, and others)

This medicine may also interact with some health conditions. Examples include:

  • Cirrhosis
  • Renal dysfunction
  • Electrolyte losses
  • Ototoxicity
  • Anuria
  • Hyperuricemia

Consult a doctor before using this drug because this document does not contain all possible disease and drug interactions. Moreover, it is not allowed to stop, start, or change the dosages without the doctor’s approval because it may lead to unwanted results.


Tell your doctor about your medical history before taking Tykerb 250 mg. In addition, inform your doctor if you are allergic to the ingredients of the drug or if you have any other allergies. Check some examples below:

  • Inability to make urine
  • Gout
  • Liver and kidney disease
  • Diabetes
  • Cancer
  • Surgery
  • Thyroid disease

It is recommended to use this medicine with a doctor’s prescription only if you are pregnant or want to become pregnant. Discuss with a doctor before breastfeeding because it is unknown if Lapatinib passes into breast milk.

Where to Buy Tykerb 250 mg?

Tykerb 250 mg can be found at many local pharmacy stores. In any case, you can choose the online pharmacy BrandRx.to. We guarantee affordable prices compared to pharmacy stores near your house, fast shipping, high-quality medicines, and great customer support. In addition, on BrandRx.to you can find drugs used to treat other diseases such as impotence, osteoporosis, kidney and liver disease, and other conditions. Place the order on our website and we will bring the medications right to your place.

Additional information

Active Ingredient



Novartis Ltd.


30 tabs/bottle




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