Zyprexa (Olanzapine) Side Effects, Before Taking, What to Avoid & More

Zyprexa is a specially formulated medication that contains Olanzapine as its active/primary ingredient. This active ingredient is an antipsychotic agent, and it belongs to the group of atypical antipsychotics (the newer generation of antipsychotics) – a class of medications.

The medicines are used to treat schizophrenia and bipolar disorder. Its mode of actions also makes it useful for making you feel less agitated and treats depression. It is also known to help decrease hallucinations.

The medication may also be used for other purposes not mentioned in this medication guide.


Side effects of Zyprexa:

Side effects are the unpleasant and undesirable effects of a medication, or a medical procedure one takes or undergoes respectively for treatment. Many medicines have side effects. However, these medicines are still manufactured and used as they are not really threatening to life, and nor are they experienced by every consumer of the medication. It has been estimated that only 1 out of 10 suffer at the hands of these side effects.

Similar to the rest, Zyprexa too comes along with a few side effects. These side effects range from being mild to severe in nature and are rarely experienced by the patients consuming the medicine.

Some of the common side effects that are considered to be mild in nature are as follows:

  • Unexplained weight gain more; likely to affect teenagers
  • Increased appetite
  • Headaches
  • Dizziness
  • Feeling drowsy
  • Restlessness
  • problems with speech or/and memory
  • tremors
  • numbness
  • changes in personality
  • dry mouth or increased salivation
  • stomach pain
  • constipation
  • Pain in your arms or legs.


Mostly, these side effects occur at the start of the treatment. They perish within a short span of time as the body gets accustomed to the presence of the medicine. However, they may persist and start to worsen triggering serious medical conditions. Therefore, it is very important to seek medical help promptly if any side effect is experienced.

Some of the potential side effects it may cause have been enlisted below:

  • uncontrolled movement of facial muscles
  • swollen hands and/or feet
  • unusual thoughts or behavior
  • hallucinations
  • Suicidal thoughts
  • sudden weakness
  • Fever accompanied with chills, sore throat, swollen gums, and painful mouth sores.
  • Dehydration
  • Signs indicating liver problems; upper stomach pain, loss of appetite, and clay-colored stools
  • high blood sugar levels
  • Very stiff muscles
  • uneven heartbeats

It is important to note here that other side effects that have not been enlisted in this guide may also be experienced. Usually, doctors and/or pharmacists inform the patients about the side effects are likely to experience at the start of their treatment.

For further queries and concerns regarding this, a doctor and/or pharmacist may be consulted.


How to use?

Before starting, carefully read out all the directions on the prescription label.

The medicines are administered orally with or without food. It is usually advised to be taken once a day. However, your doctor may direct you the otherwise, and you are required to follow your doctor’s instructions. Take appropriate and balanced doses.



  • Do not give it to children under the age of 13.
  • Neither use nor prescribe it to someone without the recommendation of a doctor.
  • Limit alcohol intake.
  • It interacts negatively with certain medicines and drugs. Thus, give names of all the medication, if any, to your doctor as a safety measure.
  • It is not safe to be used for specific medical disorders. Therefore, provide your medical history to your doctor to avoid any inconvenience.
  • It can pass through breast milk. Henceforth, do not breastfeed your baby while taking it as it can possibly harm the baby.
  • Do not use the medicine during the last 3 months of pregnancy, neither stop administering immediately if you become pregnant.
  • Keep it away from children’s reach, moisture, sunlight, and heat.