Dr. Mohanad Diab
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2026-03-287 min read

Written and medically reviewed by Dr. Mohanad Diab, Consultant Medical Oncologist, Mediclinic Abu Dhabi.

Chemotherapy Side Effects: What to Expect and How to Manage Them

Understanding Chemotherapy Side Effects


One of the biggest fears cancer patients have is about chemotherapy side effects. While side effects are real, modern medicine has made tremendous progress in managing them. Here's what you need to know.


Most Common Side Effects


1. Nausea and Vomiting

  • Modern anti-nausea drugs (antiemetics) prevent vomiting in over 80% of patients
  • Medications are given before, during, and after chemotherapy
  • Tip: Eat small, frequent meals and avoid strong smells

    • 2. Fatigue

  • The most commonly reported side effect
  • Usually peaks 2-3 days after treatment
  • Tip: Light exercise like walking can actually reduce fatigue

    • 3. Hair Loss (Alopecia)

  • Not all chemotherapy drugs cause hair loss
  • Hair typically regrows 3-6 months after treatment ends
  • Scalp cooling caps can reduce hair loss in some cases

    • 4. Low Blood Counts

  • White blood cells: Increased infection risk (day 7-14 after treatment)
  • Red blood cells: Anemia causing tiredness
  • Platelets: Increased bruising or bleeding risk

    • 5. Mouth Sores

  • Occur in about 40% of patients
  • Good oral hygiene helps prevention
  • Tip: Use a soft toothbrush and avoid spicy foods

    • Less Common But Important Side Effects


  • Numbness or tingling in hands/feet (neuropathy)
  • Changes in taste or appetite
  • Skin and nail changes
  • Cognitive changes ("chemo brain")

    • How Dr. Diab Manages Side Effects


    At Mediclinic Abu Dhabi, Dr. Mohanad Diab uses a proactive approach:


  • Pre-treatment assessment: Identifying risk factors before starting
  • Preventive medications: Anti-nausea drugs, growth factors as needed
  • Dose optimization: Adjusting doses to balance effectiveness and tolerability
  • Regular monitoring: Blood tests and check-ups between cycles
  • 24/7 support: Emergency contact for urgent side effects

    • When to Call Your Doctor Immediately


  • Fever above 38°C (100.4°F)
  • Severe vomiting lasting more than 24 hours
  • Unusual bleeding or bruising
  • Shortness of breath
  • Signs of infection (redness, swelling, pain)

    • The Good News


    Most side effects are temporary and reversible. With proper management, the vast majority of patients complete their planned treatment successfully.


    If you have questions about chemotherapy side effects, Dr. Mohanad Diab at Mediclinic Abu Dhabi is here to guide you through every step of treatment.

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