Tucaone 50 mg Tablet is used for:

• HER2-positive advanced or metastatic breast cancer

• Brain metastases in HER2+ breast cancer patients

• Use in combination with trastuzumab and capecitabine after previous HER2-directed therapies

This therapy is typically considered when other standard HER2 treatments have become ineffective.

Tucaone 50 mg Tablet belongs to a group of medicines known as tyrosine kinase inhibitors (TKIs). It works by:

• Specifically targeting the HER2 receptor, a protein that promotes cancer cell growth

• Blocking HER2-related signalling pathways that drive tumour progression

• Working synergistically with other anticancer drugs like trastuzumab and capecitabine

• Crossing the blood-brain barrier to treat cancer that has spread to the brain

This focused mechanism helps slow disease progression while minimising impact on normal cells.

Tell your doctor about all medicines, supplements, or herbal products you take. Tucaone 50 mg Tablet may interact with:

• Azole antifungals (e.g., ketoconazole, itraconazole)

• Macrolide antibiotics (e.g., clarithromycin)

• Rifampin and rifabutin (may reduce Tucatinib levels)

• Anticonvulsants like phenytoin, carbamazepine

• St. John’s Wort (a herbal product that can reduce effectiveness)

• Proton pump inhibitors and other acid-lowering agents

These interactions may either increase toxicity or reduce Tucatinib's effectiveness.

• Store below 30°C in a dry place, away from direct sunlight.

• Keep in the original blister or bottle until ready to use.

• Do not freeze or expose to moisture.

• Keep out of reach of children and pets.

• Safely discard expired or unused capsules—do not flush them.
  
  

• Take Tucatinib by mouth, exactly as prescribed by your oncologist.

• Usually taken twice a day (every 12 hours), with or without food.

• Swallow capsules whole with water. Do not crush, chew, or open them.

• Take at the same time every day to maintain steady drug levels.

• If vomiting occurs after taking a dose, do not retake it. Wait for the next scheduled dose.

• Do not miss doses, and do not stop without consulting your doctor.
  
  

Common Side Effects

Some people may have:

• Loose motion (diarrhoea)

• Feeling very tired

• Nausea or vomiting

• Mouth sores

• Less hunger

• Red or sore hands and feet

• Liver test changes (seen in blood reports)

These usually go away with time or treatment. Tell your doctor if any feel too strong or last too long.

Serious Side Effects (Call Your Doctor Right Away)

• Yellow skin or eyes (could mean a liver problem)

• Bad diarrhea with weakness

• Trouble breathing or swelling (could be an allergy)

• High fever or infections

Report any unexpected or persistent side effects to your doctor immediately.

• Keep oral rehydration salts (ORS) handy in case of diarrhoea.

• Use sunscreen and moisturisers to prevent skin reactions on hands and feet.

• Stick to a mild diet if experiencing nausea; avoid spicy or greasy foods.

• Inform your healthcare provider if you’re taking any over-the-counter meds.

• Track side effects daily using a treatment journal—it helps your doctor manage symptoms early.