Definity and Asa drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Definity (perflutren) and Asa (aspirin). Common drug interactions include back pain among females and back pain among males.

The phase IV clinical study analyzes what interactions people have when they take Definity and Asa. It is created by eHealthMe based on reports of 38 people who take the same drugs from the FDA, and is updated regularly.

What is Definity?

Definity has active ingredients of perflutren. eHealthMe is studying from 4,853 Definity users. Check the latest studies of Definity.

What is Asa?

Asa has active ingredients of aspirin. It is often used in blood clots. eHealthMe is studying from 32,557 Asa users. Check the latest studies of Asa.

eHealthMe: drug outcomes in the real world

eHealthMe runs one of the largest post-marketing drug safety studies in the world. We study millions of patients and 5,000 more each day. Our data-driven phase IV clinical trials have been referenced on 800+ peer-reviewed medical publications including The Lancet, Mayo Clinic Proceedings, and Nature. Tools to study our phase IV findings are available to the public, anonymous and free >>>.

On Aug, 27, 2026

38 people who take Definity and Asa together, and have interactions are studied.

What are the common drug interactions of Definity and Asa, by gender? *:

female:

Back pain
Neck pain
Pain in extremity
Dyspnoea (difficult or laboured respiration)
Musculoskeletal pain (pain affects the bones, muscles, ligaments, tendons, and nerves)
Oxygen saturation decreased
Anxiety
Muscle spasms (muscle contraction)
Pain
Agitation (state of anxiety or nervous excitement)

male:

Back pain
Muscle spasms (muscle contraction)
Feeling hot
Flushing (the warm, red condition of human skin)
Head discomfort
Neck pain
Pain
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect)
Tinnitus (a ringing in the ears)
Urticaria (rash of round, red welts on the skin that itch intensely)

What are the common drug interactions of Definity and Asa, 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:

Back pain
Nausea (feeling of having an urge to vomit)
Deafness
Dizziness
Erythema (redness of the skin)
Extremity contracture (permanent shortening of a muscle or joint of arms and legs)
Feeling hot
Head discomfort
Paraesthesia (sensation of tingling, tickling, prickling, pricking, or burning of a person's skin with no apparent long-term physical effect)
Tinnitus (a ringing in the ears)

50-59:

Back pain
Muscle spasms (muscle contraction)
Groin pain
Headache (pain in head)
Musculoskeletal pain (pain affects the bones, muscles, ligaments, tendons, and nerves)
Dizziness
Drug hypersensitivity
Dysstasia (difficulty in standing)
Eye swelling
Flank pain (a distressing sensation experienced around the lower back and the upper abdomen)

60+:

Back pain
Neck pain
Pain
Pallor
Agitation (state of anxiety or nervous excitement)
Aphasia (damage to the parts of the brain that control language)
Arthralgia (joint pain)
Chest pain
Cyanosis (lack of oxygen in body leads to blue appearance of skin ,mucous membrane nails)
Flank pain (a distressing sensation experienced around the lower back and the upper abdomen)

What are the existing conditions these people have? *

Type 1 Diabetes: 2 people, 5.26%
Cardiac Disorder: 2 people, 5.26%

* Approximation only. Some reports may have incomplete information.

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