Permethrin and Synthroid drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Permethrin (permethrin) and Synthroid (levothyroxine sodium). Common drug interactions include renal failure among females and bronchitis among males.

The phase IV clinical study analyzes what interactions people have when they take Permethrin and Synthroid. It is created by eHealthMe based on reports of 37 people who take the same drugs from the FDA, and is updated regularly.

What is Permethrin?

Permethrin has active ingredients of permethrin. It is often used in scabies. eHealthMe is studying from 1,547 Permethrin users. Check the latest studies of Permethrin.

What is Synthroid?

Synthroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. eHealthMe is studying from 249,205 Synthroid users. Check the latest studies of Synthroid.

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, 31, 2026

37 people who take Permethrin and Synthroid together, and have interactions are studied.

Permethrin and Synthroid drug interactions.

What are the common drug interactions of Permethrin and Synthroid, by gender? *:

female:

Renal failure (kidney dysfunction)
Drug ineffective
Arthritis (form of joint disorder that involves inflammation of one or more joints)
Asthenia (weakness)
Body height decreased
Carpal tunnel syndrome (nerve compression at wrist results numbness weakness, pain , swelling)
Cellulitis (infection under the skin)
Discomfort
Emotional disorder
Hypoaesthesia (reduced sense of touch or sensation)

male:

Bronchitis (inflammation of the mucous membrane in the bronchial tubes)
Diarrhoea
Dry skin
Gastrointestinal haemorrhage (bleeding gastrointestinal tract)
Haemorrhage (bleeding)
Ischaemic stroke (stroke; caused by an interruption in the flow of blood to the brain)
Pruritus (severe itching of the skin)
Squamous cell carcinoma of skin (a cancer of a kind of epithelial cell, the squamous cell. these cells are the main part of the epidermis of the skin)
Therapeutic response delayed (late preventive response)
Dyspnoea (difficult or laboured respiration)

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

0-1:

n/a

2-9:

n/a

10-19:

n/a

20-29:

n/a

30-39:

Chronic kidney disease
Chronic obstructive pulmonary disease (a progressive disease that makes it hard to breathe)
Diabetes mellitus (diabetes, caused by a deficiency of the pancreatic hormone insulin)
Hyperparathyroidism secondary (an abnormally high concentration of parathyroid hormone in the blood, resulting in weakening of the bones through loss of calcium-secondary)
Hypertension (high blood pressure)
Nephrogenic anaemia (anaemia due to kidney disease)
Renal failure (kidney dysfunction)

40-49:

n/a

50-59:

Anxiety
Application site paraesthesia (abnormal skin sensation of tingling, tickling, prickling, pricking, or burning felt at application site)
Application site pruritus (application site severe itching of the skin)
Dehydration (dryness resulting from the removal of water)
Dizziness
Mass
Nausea (feeling of having an urge to vomit)
Osteoarthritis (a joint disease caused by cartilage loss in a joint)
Tremor (trembling or shaking movements in one or more parts of your body)
Vertigo

60+:

Renal failure (kidney dysfunction)
Drug ineffective
Insomnia (sleeplessness)
Musculoskeletal disorder (disease of the body's muscles, joints, tendons, ligaments and nerves)
Spinal osteoarthritis (joint cartilage loss in spine)
Spondylitis (an inflammation of the vertebra with spinal cord involvement)
Suicidal ideation
Visual impairment
Application site pain
Chronic kidney disease

What are the existing conditions these people have? *

Acarodermatitis (skin inflammation caused by mites (acarids)): 5 people, 13.51%
Pain: 4 people, 10.81%
Bladder Disorder: 4 people, 10.81%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 3 people, 8.11%
Irritable Bowel Syndrome: 3 people, 8.11%
Incontinence (lack of moderation or self-control): 3 people, 8.11%
Gastroesophageal Reflux Disease (a condition in which stomach contents leak backward from the stomach into the oesophagus): 3 people, 8.11%
Dermatitis Atopic (inflammatory, chronically relapsing, non-contagious and pruritic skin disorder): 3 people, 8.11%
Arthritis (form of joint disorder that involves inflammation of one or more joints): 3 people, 8.11%
Thyroid Diseases: 2 people, 5.41%

* Approximation only. Some reports may have incomplete information.

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