What are the common side effects of chemotherapy that I should monitor in my patients?

Guideline-aligned answer with reasoning, red flags and references. Clinically reviewed by Dr Kola Tytler MBBS CertHE MBA MRCGP.

Posted: 21 August 2025Updated: 21 August 2025 Guideline-Aligned (High Confidence) Clinically Reviewed
Dr Kola Tytler MBBS CertHE MBA MRCGPClinical Lead • iatroX

Common side effects of chemotherapy that you should monitor in your patients include:

  • Neutropenia, which can lead to serious complications such as febrile neutropenia and neutropenic sepsis ,,. Patients and their carers should receive written and oral information on neutropenic sepsis, including how and when to contact 24-hour specialist oncology advice and how to seek emergency care .
  • Nausea and vomiting .
  • Nerve damage (neuropathy), which can manifest as numbness, pain, or weakness ,.
  • Joint and muscle pain .
  • Hypersensitivity reactions .
  • Hair loss (alopecia), which can be long-term after treatment with taxanes .
  • Cardiac toxicity .

It is important to be aware that some side effects, particularly after treatments like cranial radiotherapy, can be late-onset, developing months or years after treatment . These may include cognitive decline, epilepsy, hearing loss, and further neuropathy . Patients' individual risk of developing such late effects should be assessed and recorded in their written treatment summary, and explained to them and their carers .

Educational content only. Always verify information and use clinical judgement.