Singulair and Gemzar drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Singulair (montelukast sodium) and Gemzar (gemcitabine hydrochloride). Common drug interactions include hypokalaemia among females and anaemia among males.

The phase IV clinical study analyzes what interactions people have when they take Singulair and Gemzar. It is created by eHealthMe based on reports of 53 people who take the same drugs from the FDA, and is updated regularly.

What is Singulair?

Singulair has active ingredients of montelukast sodium. It is often used in asthma. eHealthMe is studying from 129,752 Singulair users. Check the latest studies of Singulair.

What is Gemzar?

Gemzar has active ingredients of gemcitabine hydrochloride. It is often used in pancreatic carcinoma. eHealthMe is studying from 20,315 Gemzar users. Check the latest studies of Gemzar.

On Jul, 26, 2026

53 people who take Singulair and Gemzar together, and have interactions are studied.

What are the common drug interactions of Singulair and Gemzar, by gender? *:

female:

Hypokalaemia (low potassium)
Interstitial lung disease
Metastatic neoplasm (spreadable cancer tumour)
Neoplasm malignant (cancer tumour)
Nausea (feeling of having an urge to vomit)
Arthralgia (joint pain)
Asthenia (weakness)
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Chest pain
Cholecystitis (infection of gallbladder)

male:

Anaemia (lack of blood)
Disease progression
Bone disorder
Breath odour
Breath sounds
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Cardiac arrest
Cataract (clouding of the lens inside the eye)
Cerebral atrophy (decrement in size of brain)
Chronic obstructive pulmonary disease (a progressive disease that makes it hard to breathe)

What are the common drug interactions of Singulair and Gemzar, 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:

Pain
Abdominal pain
Anxiety
Fatigue (feeling of tiredness)
Metastases to liver (cancer spreads to liver)
Metastases to lung (cancer spreads to lung)
Adrenal insufficiency (a condition in which the adrenal glands do not produce adequate amounts of steroids)
Anaemia (lack of blood)
Anhedonia (inability to experience pleasure from activities usually found enjoyable)
Atelectasis (partial or complete collapse of the lung)

50-59:

Exostosis (formation of new bone on the surface of a bone)
Osteomyelitis (infection of bone)
Anaemia (lack of blood)
Breath odour
Arthralgia (joint pain)
Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Deep vein thrombosis (blood clot in a major vein that usually develops in the legs and/or pelvis)
Emphysema (chronic respiratory disease - over inflation of the air sacs (alveoli) in the lungs)
Metastatic neoplasm (spreadable cancer tumour)
Osteoarthritis (a joint disease caused by cartilage loss in a joint)

60+:

Anaemia (lack of blood)
Pyrexia (fever)
Arthralgia (joint pain)
Chest discomfort
Fatigue (feeling of tiredness)
Gestational diabetes (diabetes in pregnancy)
Muscular weakness (muscle weakness)
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect)
Vaginal haemorrhage (vaginal bleeding)
Vomiting

What are the existing conditions these people have? *

Pain: 12 people, 22.64%
Metastases To Bone (cancer spreads to bone): 9 people, 16.98%
Breast Cancer: 7 people, 13.21%
Nausea (feeling of having an urge to vomit): 5 people, 9.43%
Lung Cancer - Non-Small Cell (lung cancer): 5 people, 9.43%
Ovarian Cancer (cancer of ovary): 4 people, 7.55%
Migraine (headache): 4 people, 7.55%
Breast Cancer Female: 4 people, 7.55%
Dyspnea (difficult or laboured breathing): 3 people, 5.66%

* Approximation only. Some reports may have incomplete information.

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