Cephulac and Tylenol drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Cephulac (lactulose) and Tylenol (acetaminophen). Common drug interactions include hypersomnia among females and gastrointestinal haemorrhage among males.

The phase IV clinical study analyzes what interactions people have when they take Cephulac and Tylenol. It is created by eHealthMe based on reports of 19 people who take the same drugs from the FDA, and is updated regularly.

What is Cephulac?

Cephulac has active ingredients of lactulose. eHealthMe is studying from 136 Cephulac users. Check the latest studies of Cephulac.

What is Tylenol?

Tylenol has active ingredients of acetaminophen. It is often used in pain. eHealthMe is studying from 222,310 Tylenol users. Check the latest studies of Tylenol.

On Aug, 12, 2026

19 people who take Cephulac and Tylenol together, and have interactions are studied.

What are the common drug interactions of Cephulac and Tylenol, by gender? *:

female:

Hypersomnia (excessive daytime sleepiness (eds))
Seizure (abnormal excessive or synchronous neuronal activity in the brain)
Nausea (feeling of having an urge to vomit)
Abdominal discomfort
Diarrhoea
Asthenia (weakness)
Atelectasis (partial or complete collapse of the lung)
Cardiac failure
Cardiomegaly (increased size of heart than normal)
Dehydration (dryness resulting from the removal of water)

male:

Gastrointestinal haemorrhage (bleeding gastrointestinal tract)
Post procedural haematoma (post procedural clotting of blood)
Hepatitis c
Hyperhidrosis (abnormally increased sweating)
Infective pulmonary exacerbation of cystic fibrosis (severe infective lung disease with production of abnormally thick mucus)
Chills (felling of cold)
Cough
Drug ineffective
Dyspnoea exertional (breathlessness or shortness of breath)
Ecchymosis (a discoloration of the skin resulting from bleeding underneath)

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

0-1:

n/a

2-9:

n/a

10-19:

Hypersomnia (excessive daytime sleepiness (eds))
Seizure (abnormal excessive or synchronous neuronal activity in the brain)
Abdominal discomfort
Diarrhoea
Nausea (feeling of having an urge to vomit)
Adverse drug reaction
Hypophagia (reduced food intake)

20-29:

Chills (felling of cold)
Cough
Dyspnoea exertional (breathlessness or shortness of breath)
Haemoptysis (blood-stained sputum from the bronchi, larynx, trachea, or lungs)
Hyperhidrosis (abnormally increased sweating)
Infective pulmonary exacerbation of cystic fibrosis (severe infective lung disease with production of abnormally thick mucus)

30-39:

Back pain
Bowel movement irregularity
Constipation
Drug dependence

40-49:

Hepatic failure (liver failure)
Obesity (having too much body fat)
Pancreatitis (inflammation of pancreas)
Renal failure (kidney dysfunction)
Abdominal pain upper
Abscess neck (neck abscesses)
Addison's disease (addison's disease, a hormonal disorder disease)
Adrenal disorder
Aphagia (inability or refusal to swallow)
Asthenia (weakness)

50-59:

Gastrointestinal haemorrhage (bleeding gastrointestinal tract)

60+:

Atelectasis (partial or complete collapse of the lung)
Cardiac failure
Asthenia (weakness)
Bundle branch block (disruption in the normal flow of electrical pulses that drive the heart beat)
Bundle branch block left (absence of transmission of electric impulses from the atrioventricular (av) bundle of his to the left ventricle)
Death
Drug administration error
Drug ineffective
Ecchymosis (a discoloration of the skin resulting from bleeding underneath)
Faecal occult blood positive

What are the existing conditions these people have? *

Haemarthrosis (haemarthrosis is where blood is able to enter the joint capsule): 5 people, 26.32%
Haemorrhage (bleeding): 5 people, 26.32%
Constipation: 4 people, 21.05%
Nausea And Vomiting: 3 people, 15.79%
Nausea (feeling of having an urge to vomit): 3 people, 15.79%
Fever: 3 people, 15.79%
Itching: 2 people, 10.53%
Hypersensitivity: 2 people, 10.53%
Functional Gastrointestinal Disorder (functional problem in separate organs of gastrointestinal system): 2 people, 10.53%
Epilepsy (common and diverse set of chronic neurological disorders characterized by seizures): 2 people, 10.53%

* Approximation only. Some reports may have incomplete information.

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