# What are the main side effects of chemotherapy for triple-negative breast cancer?

Canonical page: https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects
Language: en
Category: oncology
Publisher: ClinicsJo
Published: 2026-09-13T17:52:53.458Z
Content updated: 2026-09-13T17:52:53.458Z
Translation (ar): https://clinicsjo.com/ar/faq/triple-negative-breast-cancer-treatment-side-effects

The side effects of treatments for triple-negative breast cancer depend primarily on the type of treatment used. Chemotherapy may be part of the triple-negative breast cancer treatment plan before or after surgery, or to treat metastatic disease, depending on the case [\[4\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S4>). Its side effects include fatigue, nausea and vomiting, mouth sores, hair loss, and an increased risk of infection due to a decrease in white blood cell count [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>). It is important to discuss any side effects with the healthcare team.

## Common Side Effects of Chemotherapy

Chemotherapy targets rapidly dividing cells, including cancer cells and some healthy cells in the body, leading to various side effects. Prominent side effects after chemotherapy include:

- **Fatigue and exhaustion:** You may feel general weakness and tire easily, and this feeling may persist for some time [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- **Digestive problems:** These include nausea and vomiting, diarrhea, and there may be a loss of appetite [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- **Oral problems:** Chemotherapy can cause dry mouth or sores [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>). It is important to maintain good oral hygiene to avoid infection by brushing teeth and gums with a soft toothbrush 2 to 3 times daily, and using a mouthwash consisting of a saline solution and baking soda 4 times daily or as recommended by the doctor [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- **Hair loss:** Hair loss may occur.

- **Low blood counts:** Chemotherapy can affect blood cells, which may lead to an increased risk of infection [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>). Patients should take precautions to avoid infection, such as washing hands regularly and avoiding crowded places [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

## Managing Chemotherapy Side Effects

To help alleviate side effects after chemotherapy, you can follow these guidelines:

- **Oral care:** Use a soft toothbrush and fluoride toothpaste. Rinse your mouth with a saline and baking soda solution (1/8 teaspoon salt and 1/4 teaspoon baking soda in 240 ml of water) [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>). Avoid mouthwashes that contain alcohol [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- **Preventing infection:** Wash your hands with soap and water regularly, especially after touching bodily fluids or before handling food [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>). Avoid undercooked or spoiled foods, and ensure drinking water is safe [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- **Physical activity and nutrition:** Stay active by walking gradually according to your energy levels [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>). Consume sufficient amounts of protein and calories to maintain your weight [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- **Skin protection:** Be careful when exposed to the sun, wear a wide-brimmed hat, and use sunscreen with an SPF of 15 or higher [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

## When to Contact Your Doctor

It is essential to communicate with your healthcare team regarding any side effects that appear. Contact your doctor immediately if any of the following symptoms appear after chemotherapy:

- Signs of infection such as fever, chills, or sweating [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- Severe diarrhea that does not stop or contains blood [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- Severe nausea and vomiting that prevent eating or drinking [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- Severe weakness or inability to perform daily tasks [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- Redness, swelling, or discharge from any site where an IV line was inserted [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- New rash or blisters [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- Jaundice (yellowing of the skin or eyes) [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- Severe abdominal pain or persistent headache [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

- Worsening cough or difficulty breathing at rest or when performing simple tasks [\[2\]](<https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#source-S2>).

For additional information about this type of cancer, you can visit the page [Triple-Negative Breast Cancer: Diagnosis Challenges and Modern Treatment Options (Arabic)](<https://clinicsjo.com/ar/articles/triple-negative-breast-cancer-diagnosis-treatment-challenges>).

## Medical references

- [After chemotherapy - discharge](<https://medlineplus.gov/ency/patientinstructions/000012.htm>)

- [Breast Cancer](<https://medlineplus.gov/breastcancer.html>)

- [How Is Triple-Negative Breast Cancer Treated? - NCI](<https://www.cancer.gov/types/breast/treatment/triple-negative-breast-cancer>)

General health education; not a substitute for individualized clinical assessment.

Citation URL: https://clinicsjo.com/en/faq/triple-negative-breast-cancer-treatment-side-effects#answer