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

Summary:

Drug interactions are reported among people who take Ragweed (tansy ragwort) and Singulair (montelukast sodium). Common drug interactions include urticaria among females and injection site urticaria among males.

The phase IV clinical study analyzes what interactions people have when they take Ragweed and Singulair. It is created by eHealthMe based on reports of 15 people who take the same drugs from the FDA, and is updated regularly.

What is Ragweed?

Ragweed has active ingredients of tansy ragwort. eHealthMe is studying from 195 Ragweed users. Check the latest studies of Ragweed.

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.

On Jul, 14, 2026

15 people who take Ragweed and Singulair together, and have interactions are studied.

Ragweed and Singulair drug interactions.

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

female:

Urticaria (rash of round, red welts on the skin that itch intensely)
Dyspnoea (difficult or laboured respiration)
Erythema (redness of the skin)
Abdominal discomfort
Anaphylactic reaction (serious allergic reaction)
Chest discomfort
Cough
Dizziness
Eye pruritus (eye itching)
Injection site discolouration

male:

Injection site urticaria (rash of round, red welts on the skin at injection site)
Lacrimation increased
Confusional state
Crying
Disorientation (disability in which the senses of time, direction, and recognition of people and places)
Drug eruption (adverse drug reaction of the skin)
Flushing (the warm, red condition of human skin)
Gait disturbance
Hallucination, visual (seeing things that aren't there)
Hypoaesthesia (reduced sense of touch or sensation)

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

0-1:

n/a

2-9:

n/a

10-19:

Abdominal discomfort
Dyspnoea (difficult or laboured respiration)
Erythema (redness of the skin)
Lacrimation increased
Rhinorrhoea (watery mucus discharge from the nose)
Sinus congestion (blockage of sinus)
Sneezing
Urticaria (rash of round, red welts on the skin that itch intensely)
Ocular hyperaemia (an abnormally large amount of blood in eye)

20-29:

Anaphylactic reaction (serious allergic reaction)
Drug eruption (adverse drug reaction of the skin)
Eye pruritus (eye itching)
Flushing (the warm, red condition of human skin)
Lacrimation increased
Nasal congestion (blockage of the nasal passages usually due to membranes lining the nose becoming swollen from inflamed blood vessels)
Throat irritation

30-39:

Chest discomfort
Cough
Dyspnoea (difficult or laboured respiration)
Erythema (redness of the skin)
Pruritus (severe itching of the skin)
Urticaria (rash of round, red welts on the skin that itch intensely)

40-49:

Dizziness
Injection site pain
Presyncope

50-59:

Injection site urticaria (rash of round, red welts on the skin at injection site)
Aggression
Hallucination, visual (seeing things that aren't there)
Hypoaesthesia (reduced sense of touch or sensation)
Impaired driving ability
Impaired work ability
Injection site discolouration
Injection site pruritus (severe itching at injection site)
Injection site rash
Insomnia (sleeplessness)

60+:

n/a

What are the existing conditions these people have? *

Multiple Allergies (allergy to multiple agents): 3 people, 20.00%
Seasonal Allergy (allergic condition due to certain season): 2 people, 13.33%
Allergic Rhinitis: 2 people, 13.33%
Food Allergy: 1 person, 6.67%

* Approximation only. Some reports may have incomplete information.

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