Treatments & Toxicities
Understanding Your Treatment Options
Clear, evidence-based explanations of how cancer treatments work, what to expect, and how to manage side effects — reviewed by oncology specialists.
Chemotherapy
Systemic treatment targeting rapidly dividing cells
Chemotherapy uses drugs to destroy cancer cells or stop them from dividing. It can be administered intravenously, orally, or through other routes, and is often used in combination with other treatments. While effective, it affects both cancerous and healthy rapidly-dividing cells.
How It Works
Chemotherapy drugs interfere with the cell cycle — particularly DNA replication and cell division. Different drug classes target different phases of this cycle, which is why combination regimens are often more effective than single agents.
Common Agents
Immunotherapy
Harnessing the immune system to fight cancer
Immunotherapy works by stimulating or restoring the immune system's ability to detect and destroy cancer cells. Checkpoint inhibitors, CAR-T cell therapy, and cancer vaccines are among the most promising approaches in modern oncology.
How It Works
Cancer cells can evade immune detection by expressing proteins that 'turn off' immune cells. Checkpoint inhibitors block these proteins (such as PD-1, PD-L1, and CTLA-4), allowing T cells to recognize and attack tumors.
Common Agents
Targeted Therapy
Precision medicine attacking specific molecular targets
Targeted therapies are drugs designed to interfere with specific molecules involved in cancer cell growth and survival. Unlike chemotherapy, they are designed to act on specific genetic mutations or protein expressions, minimizing damage to normal cells.
How It Works
Targeted agents block specific proteins or genes that drive cancer growth — such as HER2, EGFR, BRAF, or BCR-ABL. Biomarker testing (genomic profiling) is required to determine eligibility for most targeted therapies.
Common Agents
Radiation Therapy
High-energy beams targeting tumor tissue
Radiation therapy uses high-energy radiation to damage the DNA of cancer cells, preventing them from dividing. It can be delivered externally (external beam radiation) or internally (brachytherapy), and is often used alongside surgery or chemotherapy.
How It Works
Ionizing radiation creates free radicals that break DNA strands in cancer cells. Modern techniques like IMRT, SBRT, and proton therapy allow precise targeting to minimize exposure to surrounding healthy tissue.
Common Agents
Managing Toxicities
Side effects are manageable. Here's how.
Modern oncology has made significant advances in toxicity management. Most side effects can be prevented, reduced, or treated — but it requires proactive communication with your care team and a structured approach to monitoring.
Report Early
Don't wait for side effects to become severe. Early reporting allows your team to intervene before symptoms escalate.
Nutrition Support
Targeted nutritional interventions can reduce nausea, maintain weight, and support immune function during treatment.
Structured Exercise
Evidence shows that appropriate exercise during treatment reduces fatigue, neuropathy severity, and cognitive decline.
Medication Management
Antiemetics, growth factors, and supportive medications can prevent or treat many common toxicities effectively.
Build a plan around your specific treatment.
Your toxicity profile and recovery needs depend on which treatments you received. AfterCancerMD builds personalized nutrition and exercise protocols based on your treatment history.