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Levothroid and Cognex drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Levothroid (levothyroxine sodium) and Cognex (tacrine hydrochloride). Common drug interactions include syncope among females and diarrhoea among males.

The phase IV clinical study analyzes what interactions people have when they take Levothroid and Cognex. It is created by eHealthMe based on reports of 44 people who take the same drugs from the FDA, and is updated regularly.

What is Levothroid?

Levothroid has active ingredients of levothyroxine sodium. It is often used in hypothyroidism. eHealthMe is studying from 8,974 Levothroid users. Check the latest studies of Levothroid.

What is Cognex?

Cognex has active ingredients of tacrine hydrochloride. eHealthMe is studying from 740 Cognex users. Check the latest studies of Cognex.

On Aug, 05, 2026

44 people who take Levothroid and Cognex together, and have interactions are studied.

Levothroid and Cognex drug interactions.

What are the common drug interactions of Levothroid and Cognex, by gender? *:

female:

  1. Syncope (loss of consciousness with an inability to maintain postural tone)
  2. Tearfulness (excess tearing)
  3. Unevaluable reaction
  4. Urinary tract infection
  5. Urine discolouration
  6. Urticaria (rash of round, red welts on the skin that itch intensely)
  7. Vertigo
  8. Vision blurred
  9. Nausea (feeling of having an urge to vomit)
  10. Vomiting

male:

  1. Diarrhoea
  2. Sweating increased (excess sweating)
  3. Ecchymosis (a discoloration of the skin resulting from bleeding underneath)
  4. Fall
  5. Feeling cold
  6. Hallucination (an experience involving the perception of something not present)
  7. Heart rate decreased
  8. Hypertension (high blood pressure)
  9. Lacrimation increased
  10. Micturition urgency (urgency to pass the urine)

What are the common drug interactions of Levothroid and Cognex, 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:

n/a

50-59:

  1. Abdominal pain upper
  2. Aggression
  3. Constipation
  4. Diarrhoea
  5. Hallucinations (sensations that appear real but are created by your mind)
  6. Insomnia (sleeplessness)
  7. Paranoia (psychotic disorder characterized by delusions of persecution with or without grandeur)
  8. Vomiting

60+:

  1. Nausea (feeling of having an urge to vomit)
  2. Appetite decreased (decreased appetite occurs when you have a reduced desire to eat)
  3. Sweating increased (excess sweating)
  4. Abnormal behaviour
  5. Alanine aminotransferase increased
  6. Drug ineffective
  7. Hypertension (high blood pressure)
  8. Abdominal pain
  9. Anxiety
  10. Confusion

* Approximation only. Some reports may have incomplete information.

Do you take Levothroid and Cognex?

- 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 Levothroid and Cognex:

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 Levothroid:

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 Cognex:

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 Levothroid 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 Cognex 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

How the study uses the data?

The study uses data from the FDA. It is based on levothyroxine sodium and tacrine hydrochloride (the active ingredients of Levothroid and Cognex, respectively), and Levothroid and Cognex (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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