Miralax and Serax drug interactions - a phase IV clinical study of FDA data

Summary:

Drug interactions are reported among people who take Miralax (polyethylene glycol 3350) and Serax (oxazepam). Common drug interactions include gastrointestinal haemorrhage among females and death among males.

The phase IV clinical study analyzes what interactions people have when they take Miralax and Serax. It is created by eHealthMe based on reports of 17 people who take the same drugs from the FDA, and is updated regularly.

What is Miralax?

Miralax has active ingredients of polyethylene glycol 3350. It is often used in constipation. eHealthMe is studying from 81,754 Miralax users. Check the latest studies of Miralax.

What is Serax?

Serax has active ingredients of oxazepam. It is often used in stress and anxiety. eHealthMe is studying from 1,542 Serax users. Check the latest studies of Serax.

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 Sep, 02, 2026

17 people who take Miralax and Serax together, and have interactions are studied.

What are the common drug interactions of Miralax and Serax, by gender? *:

female:

Gastrointestinal haemorrhage (bleeding gastrointestinal tract)
Pneumonia staphylococcal (pneumonia staphylococcal infections are usually caused by the organism staphylococcus aureus)
Urinary incontinence (inability to control the flow of urine and involuntary urination)
Vision blurred
Fall
Multiple sclerosis relapse (reoccurrence of a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath)
Progressive multifocal leukoencephalopathy (rapidly progressive neuromuscular disease caused by opportunistic infection of brain cells)
Urinary tract infection
Bladder dysfunction
Pneumonia aspiration (bronchopneumonia that develops due to the entrance of foreign materials into the bronchial tree)

male:

Death
Decreased appetite
Arthritis (form of joint disorder that involves inflammation of one or more joints)
Asthenia (weakness)
Asthma
Azotaemia (excess of urea or other nitrogenous compounds in the blood)
Back pain
Bile duct obstruction (blockage in the tubes that carry bile from the liver to the gallbladder)
Bladder dysfunction
Blood alkaline phosphatase increased

What are the common drug interactions of Miralax and Serax, 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:

Fall
Multiple sclerosis relapse (reoccurrence of a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath)
Progressive multifocal leukoencephalopathy (rapidly progressive neuromuscular disease caused by opportunistic infection of brain cells)
Urinary tract infection
Bladder dysfunction
Pneumonia aspiration (bronchopneumonia that develops due to the entrance of foreign materials into the bronchial tree)
Respiratory failure (inadequate gas exchange by the respiratory system)
Opportunistic infection (a microorganism that normally does not cause disease but becomes pathogenic when the body's immune system is impaired and unable to fight)
Bladder disorder
Pneumonia staphylococcal (pneumonia staphylococcal infections are usually caused by the organism staphylococcus aureus)

60+:

Death
Decreased appetite
Asthenia (weakness)
Asthma
Azotaemia (excess of urea or other nitrogenous compounds in the blood)
Back pain
Bile duct obstruction (blockage in the tubes that carry bile from the liver to the gallbladder)
Bladder dysfunction
Blood alkaline phosphatase increased
Blood lactate dehydrogenase increased

What are the existing conditions these people have? *

Pain: 9 people, 52.94%
Cystitis Interstitial (unknown cause characterized by bladder pain): 8 people, 47.06%
Sleep Disorder: 8 people, 47.06%
Restless Leg Syndrome (a powerful urge to move your legs): 8 people, 47.06%
Neurogenic Bladder (the normal function of the bladder is to store and empty urine in a coordinated, controlled fashion): 8 people, 47.06%
Fibromyalgia (a long-term condition which causes pain all over the body): 8 people, 47.06%
Muscle Spasticity (tight or stiff muscles and an inability to control those muscles): 8 people, 47.06%
Multiple Sclerosis (a nervous system disease that affects your brain and spinal cord. it damages the myelin sheath): 8 people, 47.06%
Depression: 8 people, 47.06%
Migraine (headache): 8 people, 47.06%

* Approximation only. Some reports may have incomplete information.

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