Theo-dur and Zyprexa drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Theo-dur (theophylline) and Zyprexa (olanzapine). Common drug interactions include white blood cell count increased among females and pneumonia among males.

The phase IV clinical study analyzes what interactions people have when they take Theo-dur and Zyprexa. It is created by eHealthMe based on reports of 31 people who take the same drugs from the FDA, and is updated regularly.

What is Theo-dur?

Theo-dur has active ingredients of theophylline. It is often used in asthma. eHealthMe is studying from 4,451 Theo-dur users. Check the latest studies of Theo-dur.

What is Zyprexa?

Zyprexa has active ingredients of olanzapine. It is often used in bipolar disorder. eHealthMe is studying from 64,724 Zyprexa users. Check the latest studies of Zyprexa.

On Jul, 11, 2026

31 people who take Theo-dur and Zyprexa together, and have interactions are studied.

What are the common drug interactions of Theo-Dur and Zyprexa, by gender? *:

female:

White blood cell count increased
Drug-induced liver injury (diseases of the liver that are caused by physician-prescribed medications)
Hypokalaemia (low potassium)
Primary hyperaldosteronism (too much aldosterone is produced by the adrenal glands)
Adrenal cortex atrophy (partial or complete wasting away of a adrenal cortex)
Adverse drug reaction
Anaemia (lack of blood)
Ascites (accumulation of fluid in the abdominal cavity)
Atelectasis (partial or complete collapse of the lung)
Blood alkaline phosphatase increased

male:

Pneumonia
Neuroleptic malignant syndrome (a life-threatening neurological disorder most often caused by an adverse reaction to neuroleptic or antipsychotic agents)
Dyspnoea (difficult or laboured respiration)
Effusion (an escape of fluid into a body cavity)
Feeding disorder (when children refuse to eat certain food groups)
Injury asphyxiation
Malnutrition (a condition that results from eating a diet in which certain nutrients are lacking)
Mental disorder (a psychological term for a mental or behavioural pattern or anomaly that causes distress or disability)
Peripheral swelling
Soliloquy

What are the common drug interactions of Theo-Dur and Zyprexa, by age (0-1 to 60+)? *:

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

Adverse drug reaction
Diabetes mellitus (diabetes, caused by a deficiency of the pancreatic hormone insulin)
Drug exposure during pregnancy
Gestational diabetes (diabetes in pregnancy)
Type 2 diabetes mellitus

30-39:

Suicide attempt

40-49:

Blood glucose decreased
Blood pressure systolic increased
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Chest pain
Cholecystitis (infection of gallbladder)
Cholelithiasis (the presence or formation of gallstones in the gallbladder or bile ducts)
Cyst (a closed sac)
Decreased appetite
Diarrhoea
Dizziness

50-59:

Fatigue (feeling of tiredness)
Angina unstable (chest pain due to ischemia of the heart muscle- unstable)
Chest pain
Dental caries
Diabetes mellitus (diabetes, caused by a deficiency of the pancreatic hormone insulin)
Dysfunctional uterine bleeding
Ear pain
Hyperglycaemia (high blood sugar)
Hypertension (high blood pressure)
Local swelling (swelling at the site of some application of substance or injury)

60+:

Neuroleptic malignant syndrome (a life-threatening neurological disorder most often caused by an adverse reaction to neuroleptic or antipsychotic agents)
Pneumonia
Dementia (madness)
Hospitalisation
Hypoxia (low oxygen in tissues)
Insomnia (sleeplessness)
Muscle rigidity (muscle stiffness)
Overdose
Pyrexia (fever)
Disseminated intravascular coagulation (systemic activation of blood coagulation)

What are the existing conditions these people have? *

Schizophrenia (a mental disorder characterized by a breakdown of thought processes): 13 people, 41.94%
Insomnia (sleeplessness): 6 people, 19.35%
Depression: 5 people, 16.13%
Epilepsy (common and diverse set of chronic neurological disorders characterized by seizures): 4 people, 12.90%
Psychiatric Symptom: 3 people, 9.68%
Arthritis (form of joint disorder that involves inflammation of one or more joints): 3 people, 9.68%
Stress And Anxiety: 2 people, 6.45%
Schizoaffective Disorder (a mental disorder characterized by disordered thought): 2 people, 6.45%
Headache (pain in head): 2 people, 6.45%
Bipolar I Disorder (mood disorder that is characterized by at least one manic or mixed episode): 2 people, 6.45%

* Approximation only. Some reports may have incomplete information.

Do you take Theo-dur and Zyprexa?

- Personalize this study to your gender, age, symptoms and drugs
- Predict drug outcomes for up to one year with AI
- Get an AI agent to monitor your drugs continuously