Trade Name: Vesanoid
All-trans Retinoic Acid, ATRA
Tretinoin is an anti-cancer ("antineoplastic" or "cytotoxic") chemotherapy drug.
Tretinoin is classified as a "retinoid." (For more detail, see "How Tretinoin
Works" section below).
What Tretinoin Is Used For:
- Tretinoin is used to treat acute promyelocytic leukemia (APL, APML) in people who
have not responded to other treatments.
Note: If a drug has been approved for one use, physicians sometimes elect
to use this same drug for other problems if they believe it might be helpful.
How Tretinoin Is Given:
- Tretinoin is given by mouth (in capsule form).
- One size capsule - 10mg, do not crush chew or dissolve capsules. Protect from light.
- Take Tretinoin with food.
- It also is used as a lotion (topical) for patients with acne and certain rashes.
- The amount of Tretinoin you will receive depends on many factors, including your
height and weight, your general health or other health problems, and the type of
cancer you have. Your doctor will determine your dosage and schedule.
Tretinoin Side Effects:
Important things to remember about Tretinoin side effects:
- Most people do not experience all of the Tretinoin side effects listed.
- Tretinoin side effects are often predictable in terms of their onset and duration.
- Tretinoin side effects are almost always reversible and will go away after treatment
- There are many options to help minimize or prevent Tretinoin side effects.
- There is no relationship between the presence or severity of Tretinoin side effects
and the effectiveness of the medication.
The following Tretinoin side effects are common (occurring in greater than 30%)
for patients taking Tretinoin:
- Typical retinoid toxicity. Symptoms that are similar to those found in patients
taking high doses of vitamin A: Headache, fever, dry skin, dry mucous membranes
(mouth and nose), bone pain, nausea and vomiting, rash, mouth sores, itching, sweating,
- Flu-like symptoms: malaise,
- Bleeding problems
- Swelling of feet or ankles
(bone and joint pain, chest discomfort)
- Abdominal pain
The following are less common Tretinoin side effects (occurring in 10-29%) for patients
- Weight increase
- Heart rate irregularities (arrhythmias - see heart problems)
- Poor appetite
- Weight loss
- Earache or feeling of fullness in the ears
- Numbness and tingling in hands and feet
- Low blood pressure
- High blood pressure
- A very serious side effect that is preventable with proper monitoring and immediate
treatment is APL differentiation syndrome. This syndrome is a reaction between
the drug and the leukemia. This syndrome produces fever, difficulty breathing,
weight gain, lung and heart problems. It is generally treated with high-dose
steroids. In most cases, treatment with Tretinoin will continue. Be
sure to let your health care professional know if you experience fever of 100.5F
or 38C, difficulty breathing, or sudden weight gain. The syndrome usually
occurs during the first month of treatment, with some cases reported following the
Not all side effects are listed above, some that are rare (occurring in less than
10% of patients) are not listed here. However, you should always inform your
health care provider if you experience any unusual symptoms.
When To Contact Your Doctor or Health Care Provider:
Contact your health care provider immediately, day or night, if you should experience
any of the following symptoms:
- Fever of 100.4° F (38° C), chills (possible signs of infection)
- Difficulty breathing, sudden weight gain, swelling, vision changes
- Any signs of bleeding, including black or tarry stools, or blood in your stools
- Severe abdominal pain
The following symptoms require medical attention, but are not emergency situations.
Contact your health care provider within 24 hours of noticing any of the following:
- Nausea (interferes with ability to eat and unrelieved with prescribed medications)
- Vomiting (vomiting more than 4-5 times in a 24-hour period)
- Mouth sores (painful redness, swelling or ulcers)
- Diarrhea (4-6 episodes in a 24-hour period)
- Constipation unrelieved by laxative use
- Signs of infection such as redness or swelling, pain on swallowing, coughing up
mucous, or painful urination.
- Swelling of the feet or ankles. Sudden weight gain
- Bone or joint pain
- Yellowing of the skin or eyes
Always inform your health care provider if you experience any unusual symptoms.
- Before starting Tretinoin treatment, make sure you tell your doctor about any other
medications you are taking (including prescription, over-the-counter, vitamins,
herbal remedies, etc.). Do not take aspirin, or products containing
aspirin unless your doctor specifically permits this.
- Do not receive any kind of immunization or vaccination without your doctor's approval
while taking Tretinoin.
- Inform your health care professional if you are pregnant or may be pregnant prior
to starting this treatment. Pregnancy category D (Tretinoin may be hazardous
to the fetus. Women who are pregnant or become pregnant must be advised of
the potential hazard to the fetus).
- Because of the extremely high risk that a deformed infant can result if pregnancy
occurs while taking Tretinoin in any amount even for short periods of time, for
both men and women: Do not conceive a child (get pregnant) while taking Tretinoin.
Two methods of effective contraception are recommended for women of childbearing
potential, unless absolute abstinence is the chosen method. Discuss with your
doctor when you may safely become pregnant or conceive a child after therapy.
- Do not breast feed while taking Tretinoin.
Tretinoin Self Care Tips:
- Drink 2 to 3 quarts of fluid every 24 hours, unless you were told to restrict your
fluid intake, and maintain good nutrition. This will decrease your chances of being
constipated, and prevent dehydration.
- When you start taking Tretinoin, you may become dizzy, confused, anxious, or extremely
tired. Do not attempt to drive or operate heavy machinery, unless you know how you
will respond to Tretinoin.
- Avoid wearing contact lenses if you have dry or irritated eyes.
- Avoid sun exposure. Wear SPF 15 (or higher) sun block and protective clothing.
- To reduce nausea, take anti-nausea medications as prescribed by your doctor, and
eat small, frequent meals.
- To help treat/prevent mouth sores, use a soft toothbrush, and rinse three times
a day with 1/2 to 1 teaspoon of baking soda and/or 1/2 to 1 teaspoon of salt mixed
with 8 ounces of water.
- Keep your bowels moving. Your health care provider may prescribe a stool softener
to help prevent constipation that may be caused by Tretinoin.
- In general, drinking alcoholic beverages should be kept to a minimum or avoided
completely. You should discuss this with your doctor.
- Do not share your medicines with anyone. Keep out of reach of children.
- If you experience symptoms or side effects, be sure to discuss them with your health
care team. They can prescribe medications and/or offer other suggestions that
are effective in managing such problems.
Monitoring and Testing While Taking Tretinoin:
You will be monitored regularly by your health care professional while you are taking
Tretinoin to monitor side effects and check your response to therapy. For
women of childbearing age, a pregnancy test is required one week prior to beginning
this therapy and every month during treatment. Blood counts and lipid (fats,
cholesterol) levels and liver function all need to be analyzed before treatment
begins and regularly during treatment. These are measured through blood tests.
How Tretinoin Works:
Retinoids are drugs that are relatives of vitamin A. Retinoids control normal
cell growth, cell differentiation (the normal process of making cells different
from each other), and cell death during embryonic development and in certain tissues
later in life. Retinoids effects on the cells are controlled by receptors
on the nucleus of each cell (nuclear receptors).
There are two major classes of retinoid nuclear receptors: retinoic acid receptors
(RAR) and retinoid-X-receptors (RXR). There are also subtypes within each
class. Each of these types of receptors has different functions in different
tissues. The different retinoid drugs work by binding to different receptors;
which, in turn, affect cell growth and differentiation.
Retinoids are relatively new types of anti-cancer drugs. They have been used
alone or in combination to treat a variety of cancers such as skin cancers, cutaneous
T-cell lymphoma, acute promyelocytic leukemia, lung cancer, breast cancer, ovarian
cancer, bladder cancer, kidney cancer, and head and neck cancers. Retinoids
have also been used experimentally in an attempt to prevent certain types of cancer.
There is ongoing research to determine their role in both cancer treatment and prevention.
Retinoids have been associated with side effects such as skin problems (dryness,
peeling, itching, sun sensitivity), reversible elevation in liver enzymes, temporary
abnormal lipid levels, low thyroid levels (hypothyroidism), and headaches.
Taking supplemental doses of vitamin A may increase the side effects. Vitamin
supplementation should be discussed with your physician.
Note: We strongly encourage you to talk with your health care professional
about your specific medical condition and treatments. The information contained
in this website is meant to be helpful and educational, but is not a substitute
for medical advice.