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Side effects of treatment

Any cancer treatment can have side effects, but it’s hard to know if or when they might happen to you.

Your healthcare team will explain which side effects are more likely to happen and when they may start. They’ll suggest ways to deal with any side effects you may have. You’ll also be told which side effects to report right away and which ones can wait until your next appointment. 

When side effects happen and how long they last

Side effects can happen any time during your treatment. Some may happen quickly and others may appear a few days later or may not start until after you’ve been in treatment for a while.

Most side effects go away after treatment is over, but others may take longer to go away or may be permanent.

You and your healthcare team can better manage your side effects if you keep track of them. Keeping track of your side effects can help you:

  • notice when a new side effect appears or something unexpectedly gets worse
  • decide with your doctor if you need to change your treatment or dose
  • stay on your drug treatment plan (if you’re receiving chemo, hormonal or biological therapy)

ALERT – Allergic reaction

Signs of a life-threatening allergic reaction to a treatment drug include:

  • wheezing or trouble breathing
  • developing sudden or severe itching
  • breaking out in a rash or hives

If you have any of these signs, go to your nearest emergency room.

Last modified on:  11 July 2011

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