• Non-small cell lung cancer (NSCLC) with epidermal growth factor receptor mutations.

• Metastatic non small cell lung cancer progressing after platinum based chemotherapy.

It functions by inhibiting the ErbB family of proteins, which includes EGFR (also known as the epidermal growth factor receptor, or ErbB1, ErbB2, ErbB3, and ErbB4) and HER2. Changes in the genes that create these proteins can have an impact on how cancer cells multiply and disseminate. Through the inhibition of these proteins and its activities, this medication can prevent the growth and proliferation of cancer cells and can help to slow or stop the progression of cancer.

Inform your healthcare provider about all the medicines you take, including prescription medications, over-the-counter medications, nutritional or vitamin supplements, and herbal products. Certain medications may interact with Afacien 40mg Tablet and reduce effectiveness by causing undesirable side effects. Inform your physician if you are taking antifungals or immunosuppressive drugs.

• Afacien 40mg Tablet should be stored at room temperature, between 20°C to 25°C (68°F to 77°F).

• Protected from light.

• Keep it in its original packaging until it is ready to be used.

• Keep out of the reach of children and pets.

• Should be disposed of properly.

Afacien 40mg Tablet is an oral medication that is usually taken once a day, at approximately the same time each day, before food. If you have already eaten, wait at least 3 hours before taking this medicine.

It should be taken as prescribed by a doctor. These tablets should be swallowed whole with a glass of water. They should not be crushed, chewed, or opened, as this can affect how the medication is absorbed and decrease its effectiveness. Take the missed dose as soon as you recall if your next planned dose is more than eight hours away. You should not take a double dose to make up for the second dose.

Like all medications, Afacien 40mg Tablet can cause side effects, although not everyone who takes it will experience them. 
Serious:

• Interstitial lung disease (ILD)

• Severe diarrhea or dehydration

• Liver problems

• Eye problems, such as corneal erosion or ulceration

• Hemorrhage or bleeding problems

• Renal impairment

• Cardiac problems

Common: 

• Diarrhea

• Mouth sores

• Acne or skin rash

• Nausea and vomiting

• Fatigue

• Loss of appetite

• Abdominal pain

• Nail changes, such as nail bed infections or inflammation

• Dry skin or itching

• Eye irritation or dryness

• Respiratory infections

• Follow all dosing instructions provided by your healthcare provider.
  

• Do not take more or less of the medicine than prescribed.
  

• Report any new or worsening symptoms immediately, especially those affecting the lungs, eyes, skin, liver, kidneys, heart, or causing bleeding.
  

• Women should avoid pregnancy and breastfeeding during treatment.
  

• Men and women of reproductive age should use effective contraception during treatment and for at least two weeks after the last dose.
  

• Inform your doctor if you notice signs of dehydration, such as dry mouth or reduced urination.
  

• Drink plenty of fluids while taking Afacien 40mg Tablet, especially if diarrhea occurs.
  

• Avoid grapefruit and grapefruit juice, as they may interact with the medicine and increase the risk of side effects.