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Montelukast sodium and Femara drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Montelukast sodium (montelukast sodium) and Femara (letrozole). Common drug interactions include infusion site erythema among females.

The phase IV clinical study analyzes what interactions people have when they take Montelukast sodium and Femara. It is created by eHealthMe based on reports of 28 people who take the same drugs from the FDA, and is updated regularly.

What is Montelukast sodium?

Montelukast sodium has active ingredients of montelukast sodium. It is often used in asthma. eHealthMe is studying from 26,094 Montelukast sodium users. Check the latest studies of Montelukast sodium.

What is Femara?

Femara has active ingredients of letrozole. It is often used in breast cancer. eHealthMe is studying from 19,630 Femara users. Check the latest studies of Femara.

On Aug, 07, 2026

28 people who take Montelukast sodium and Femara together, and have interactions are studied.

Montelukast sodium and Femara drug interactions.

What are the common drug interactions of Montelukast Sodium and Femara, by gender? *:

female:

  1. Infusion site erythema (reddening of the skin at infusion site)
  2. Diarrhoea
  3. Nausea (feeling of having an urge to vomit)
  4. Pain
  5. Pyrexia (fever)
  6. Urinary tract infection
  7. Abdominal pain upper
  8. Acute coronary syndrome (acute chest pain and other symptoms that happen because the heart does not get blood)
  9. Adjustment disorder
  10. Alopecia (absence of hair from areas of the body)

male:

n/a

What are the common drug interactions of Montelukast Sodium and Femara, by age (0-1 to 60+)? *:

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

n/a

40-49:

  1. Lung disorder (lung disease)
  2. Meniscus lesion (lesion of a crescent-shaped piece of cartilage between the femur and the tibia)
  3. Metastases to bone (cancer spreads to bone)
  4. Metastases to liver (cancer spreads to liver)
  5. Metastases to spine (cancer spreads to spine)
  6. Metastases to thorax (cancer spreads to thorax)
  7. Micturition urgency (urgency to pass the urine)
  8. Muscle strain (an injury to a muscle in which the muscle fibres tear)
  9. Nausea (feeling of having an urge to vomit)
  10. Neoplasm malignant (cancer tumour)

50-59:

n/a

60+:

  1. Infusion site erythema (reddening of the skin at infusion site)
  2. Fatigue (feeling of tiredness)
  3. Infusion site swelling
  4. Muscle spasms (muscle contraction)
  5. Vomiting
  6. Arthralgia (joint pain)
  7. Back pain
  8. Blood albumin decreased
  9. Blood creatine phosphokinase increased
  10. Carbon dioxide increased

What are the existing conditions these people have? *

  1. Breast Cancer Metastatic: 15 people, 53.57%
  2. Irritable Bowel Syndrome: 14 people, 50.00%
  3. Immunodeficiency Common Variable: 9 people, 32.14%
  4. Breast Cancer Female: 2 people, 7.14%

* Approximation only. Some reports may have incomplete information.

Do you take Montelukast sodium and Femara?

- 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

Related studies:

Effectiveness of, side effects of, and alternative drugs to the 2 drugs:

Browse all drug interactions of Montelukast sodium and Femara:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Sub-studies by gender and age:

Female: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Male: 0-1 2-9 10-19 20-29 30-39 40-49 50-59 60+

Browse all side effects of Montelukast sodium:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all side effects of Femara:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all interactions between Montelukast sodium and drugs from A to Z:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Browse all interactions between Femara and drugs from A to Z:

a b c d e f g h i j k l m n o p q r s t u v w x y z

Related publications that referenced our studies

How the study uses the data?

The study uses data from the FDA. It is based on montelukast sodium and letrozole (the active ingredients of Montelukast sodium and Femara, respectively), and Montelukast sodium and Femara (the brand names). Other drugs that have the same active ingredients (e.g. generic drugs) are not considered. Dosage of drugs is not considered in the study.

How to use the study?

DO NOT STOP MEDICATIONS without first consulting your doctor. If there are any serious or long term adverse effects discovered in the study, discuss the study with your doctor to ensure that proper medication management will be in place if applicable.

Who is eHealthMe?

With medical big data and proven AI/ML algorithms, eHealthMe provides a platform for everyone to run phase IV clinical trials. We study millions of patients and 5,000 more each day. Results of our real-world drug study have been referenced on 800+ peer-reviewed medical publications, including The Lancet, Mayo Clinic Proceedings, and Nature. Our analysis results are available to researchers, health care professionals, patients (testimonials), and software developers (open API).

WARNING, DISCLAIMER, USE FOR PUBLICATION

WARNING: Please DO NOT STOP MEDICATIONS without first consulting a physician since doing so could be hazardous to your health.

DISCLAIMER: All material available on eHealthMe.com is for informational purposes only, and is not a substitute for medical advice, diagnosis, or treatment provided by a qualified healthcare provider. All information is observation-only. Our phase IV clinical studies alone cannot establish cause-effect relationship. Different individuals may respond to medication in different ways. Every effort has been made to ensure that all information is accurate, up-to-date, and complete, but no guarantee is made to that effect. The use of the eHealthMe site and its content is at your own risk.

If you use this eHealthMe study on publication, please acknowledge it with a citation: study title, URL, accessed date.

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