The long term side effects of chemotherapy aren’t usually your first concern when you find out chemotherapy is recommended for your cancer. And that’s how it should be. In most cases, the benefits of treatment far outweigh any possible complications down the line. But with improved survival from many types of cancers, it's important to understand the long term side effects of chemotherapy that may occur months or years after treatment is completed.
Before addressing possible long term side effects, keep in mind that everyone is different. Some people may have several of these side effects, while many will have none. Side effects also vary considerably depending on the particular chemotherapy medications that are used.
Cardiac ConcernsChemotherapy can cause cardiac effects early in treatment, but in some cases the effects may not show up until much later. One notable example is heart damage following treatment with the medication Adriamycin (doxorubicin). With this drug, a possible long term side effect is weakening of the heart muscle, resulting in a decreased ability to pump blood through the body (heart failure). Symptoms may include increasing shortness of breath, fatigue, and swelling of the feet and ankles. If you have been treated with Adriamycin, your doctor may recommend a MUGA scan to monitor how your heart is pumping.
Other cancer treatments, such as radiation therapy to the chest area, may cause damage to the heart muscle as well.
- Heart Problems with Doxorubicin
- What Is the MUGA Scan?
- Left Breast Radiation May Damage Coronary Arteries
FatigueDuring chemotherapy, most people deal with fatigue -- yet a third of people continue to experience fatigue for months to years after chemotherapy is completed. It is important to share this symptom with your doctor, because many causes of fatigue are reversible.
Chemobrain"Chemobrain" -- a constellation of symptoms that includes problems with memory and concentration -- has only recently been recognized as a long-term side effect of chemotherapy. Chemobrain symptoms can be very frustrating, but an awareness of things you can do to cope with the symptoms can be very helpful. In most cases, chemobrain symptoms improve over time.
InfertilityPrimarily a concern for younger people with cancer, loss of fertility after chemotherapy can be heartbreaking. Infertility following treatment varies with the dose and type of chemotherapy medications used, and doesn’t affect everyone. If you believe you may want to have children after treatment (for both men and women), talk to your physician about the options available to you before you start treatment.
Peripheral NeuropathyPeripheral neuropathy, experienced most often as a sensation of numbness and burning in your feet and hands, along with constipation, is another long-term side effect of chemotherapy. This side effect occurs more commonly in people with a history of diabetes, alcoholism, or malnutrition.
Some drugs that can cause this side effect in up to a third of people include Taxotere (docetaxel) and Taxol (paclitaxel). Other medications, such as Platinol (cisplatin), Oncovin (vincristine), and Novelbine (vinorelbine), can also result in peripheral neuropathy.
Hearing LossOne of the most common long-term side effects of Platinol (cisplatin), a medication used for many cancers including lung cancer, is hearing loss. Other medications may also cause hearing loss and tinnitus (ringing in the ears).
Skeletal EffectsOsteoporosis (thinning of the bones) is the most common late effect of chemotherapy. Most chemotherapy drugs cause bone loss to accelerate, and changes in diet that accompany cancer and its treatment can amplify the problem. The greatest concern over the long run is fractures that can result from this bone loss.
Chemotherapy has also been associated with osteomalacia, bone loss related to a deficiency of vitamin D.
Respiratory EffectsChemotherapy can cause scarring of the lung (pulmonary fibrosis) and decreased lung capacity in some people. This may be more pronounced when chemotherapy is combined with radiation therapy to the chest area.
Liver EffectsMany chemotherapy medications can cause toxic damage to the liver (hepatotoxicity). Thankfully, the liver has a remarkable potential to regenerate most of the time, as long as other damaging effects (such as excess alcohol intake) are avoided.
Kidney and Bladder EffectsCertain chemotherapy medications, such as cisplatin, can cause damage to the kidneys and bladder. This can result in a decreased ability of your kidneys to filter your blood. Damage to the bladder can also occur and may be temporary or permanent. Symptoms of bladder irritation may include pain or urgency with urination, or blood in your urine.
Effect on the EyesSteroids are often given along with chemotherapy or for symptoms and side effects related to cancer. This can hasten the development of cataracts in some people.
Secondary CancerDue to the mechanism by which chemotherapy medications work, they can cause DNA damage in normal cells, which may result in secondary cancers down the line. Some chemotherapy medications are more likely to cause this damage, with a category called alkylating agents being most likely (an example of these is Cytoxan (cyclophosphamide)).
Medications used to treat lung cancer that may cause a secondary cancer (though less likely) include Vepesid (etoposide) and Platinol (cisplatin.
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