ShiveringPhase 4NCT07855588
Intravenous Paracetamol Versus Magnesium Sulfate for Control of Shivering Following Spinal Anesthesia in Cesarean Section
A Phase 4 study testing Paracetamol and Magnesium Sulfate in people with Shivering and Post-Spinal Shivering, run by Assiut University.
Trial summary
Spinal anesthesia is widely used for cesarean deliveries, but shivering is a frequent complication that occurs in 40% to 60% of patients. Post-spinal shivering can cause maternal discomfort, increase oxygen consumption and metabolic demands, and interfere with clinical monitoring. Read more about this study
- Who is it for?
- Ages 20 to 40 years, women only
- Conditions the study is for
- Shivering, Post-Spinal Shivering
- What is being tested?
- Paracetamol and Magnesium Sulfate
- Type of treatment
- Injection or infusion
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 90 participants
- Where
- No sites listed yet
- Study dates
- Nov 2026to Dec 2027
- Phase
- Phase 4
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 40 years
- Women only
- No healthy volunteers
- Adult
Who may be able to join
- American Society of Anesthesiologists (ASA) physical status class I or II
- Pregnant women aged 20 to 40 years
- Term gestation (>= 37 weeks) with an uncomplicated pregnancy
- Scheduled for elective cesarean delivery under planned spinal anesthesia
- Patient agreement and signed written informed consent
Who cannot join
- Patient refusal
- Morbid obesity (BMI > 35 kg/m²)
- Contraindications to spinal anesthesia
- Significant organ dysfunction (e.g., cardiac, respiratory, renal, or hepatic disorders)
- Known hypersensitivity or allergy to paracetamol or magnesium sulfate
- Cardiovascular or neuromuscular disorders in which magnesium administration is contraindicated
- Emergency cesarean section
About this study
Official title: Intravenous Paracetamol Versus Magnesium Sulfate for Control of Shivering Following Spinal Anesthesia in Cesarean Section: A Comparative Study
Spinal anesthesia is widely used for cesarean deliveries, but shivering is a frequent complication that occurs in 40% to 60% of patients. Post-spinal shivering can cause maternal discomfort, increase oxygen consumption and metabolic demands, and interfere with clinical monitoring. Both paracetamol and magnesium sulfate have thermoregulatory properties that may prevent or reduce shivering.
The purpose of this clinical trial is to compare the efficacy and safety of intravenous paracetamol versus intravenous magnesium sulfate in preventing and reducing shivering following spinal anesthesia in women undergoing elective cesarean section.
Read more
A total of 90 pregnant women scheduled for elective cesarean delivery will be randomly assigned to one of two groups:
- Group P (Paracetamol Group): Participants receive intravenous paracetamol (15 mg/kg) infused over 15 minutes immediately following the subarachnoid block.
- Group M (Magnesium Sulfate Group): Participants receive intravenous magnesium sulfate (30 mg/kg) administered immediately following the subarachnoid block.
The primary outcome evaluated is the severity of post-spinal shivering assessed by shivering scores. Secondary outcomes include hemodynamic parameters (heart rate, blood pressure, oxygen saturation), postoperative pain, complications such as nausea and vomiting, and maternal satisfaction.
- Conditions
- Shivering, Post-Spinal Shivering
- Being tested
- Paracetamol, Magnesium Sulfate
- Keywords
- Paracetamol, Acetaminophen, Magnesium Sulfate, Spinal Anesthesia, Cesarean Section, Subarachnoid Block, Thermoregulation
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ParacetamolDrug
Administered intravenously at a dose of 15 mg/kg infused over 15 minutes immediately after the completion of the subarachnoid block.
Magnesium SulfateDrug
Administered intravenously at a dose of 30 mg/kg immediately after the completion of the subarachnoid block.
| Study group | Role | What they receive |
|---|---|---|
| Group P: Paracetamol Group | Active comparator | Participants receive intravenous paracetamol at a dose of 15 mg/kg infused over 15 minutes immediately after the completion of the subarachnoid block. Receives: Drug: Paracetamol |
| Group M: Magnesium Sulfate Group | Active comparator | Participants receive intravenous magnesium sulfate at a dose of 30 mg/kg administered immediately after the completion of the subarachnoid block. Receives: Drug: Magnesium Sulfate |
What is being measured
The primary outcome is the main question the study is designed to answer.
Post-Spinal Shivering Score
Post-spinal shivering severity is assessed using a 5-point shivering scale where Grade 0 indicates no shivering; Grade 1 indicates piloerection or peripheral vasoconstriction without visible shivering; Grade 2 indicates muscular activity in only one muscle group; Grade 3 indicates muscular activity in more than one muscle group, but not generalized; and Grade 4 indicates generalized, whole-body shivering. Total scores range from 0 to 4, with higher scores representing greater shivering severity
Measured: Up to 2 hours postoperatively
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Oct 2026
- Study startNov 2026 (estimated)
- Primary completionNov 2027 (estimated)
- Study completionDec 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for ShiveringStudies of the same condition, open and under way.
- More trials run by Assiut UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind
- Who is masked
- Participant
- Enrolment
- 90 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Assiut University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Maram Ahmed Gad Abozaid, Assiut University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07855588
- Sponsor's protocol ID
- Paracetamol vs MgSO4 for CS
- Status last verified
- Sep 2026
- First submitted
- 28 Sep 2026
- Last updated
- 2 Oct 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Intravenous Paracetamol Versus Magnesium Sulfate for Control of Shivering Following Spinal Anesthesia in Cesarean Section: A Comparative Study
- ClinicalTrials.gov ID
- NCT07855588
- Acronym / sponsor ID
- Paracetamol vs MgSO4 for CS
- Conditions
- Shivering, Post-Spinal Shivering
- Keywords
- Paracetamol, Acetaminophen, Magnesium Sulfate, Spinal Anesthesia, Cesarean Section, Subarachnoid Block, Thermoregulation
- Phase
- Phase 4
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 90 participants (estimated)
- Lead sponsor
- Assiut UniversityUniversity, hospital or other
- Study start
- Nov 2026 (estimated)
- Primary completion
- Nov 2027 (estimated)
- Study completion
- Dec 2027 (estimated)
- First posted
- 2 Oct 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
Spinal anesthesia is widely used for cesarean deliveries, but shivering is a frequent complication that occurs in 40% to 60% of patients. Post-spinal shivering can cause maternal discomfort, increase oxygen consumption and metabolic demands, and interfere with clinical monitoring. Both paracetamol and magnesium sulfate have thermoregulatory properties that may prevent or reduce shivering.
The purpose of this clinical trial is to compare the efficacy and safety of intravenous paracetamol versus intravenous magnesium sulfate in preventing and reducing shivering following spinal anesthesia in women undergoing elective cesarean section.
A total of 90 pregnant women scheduled for elective cesarean delivery will be randomly assigned to one of two groups:
- Group P (Paracetamol Group): Participants receive intravenous paracetamol (15 mg/kg) infused over 15 minutes immediately following the subarachnoid block.
- Group M (Magnesium Sulfate Group): Participants receive intravenous magnesium sulfate (30 mg/kg) administered immediately following the subarachnoid block.
The primary outcome evaluated is the severity of post-spinal shivering assessed by shivering scores. Secondary outcomes include hemodynamic parameters (heart rate, blood pressure, oxygen saturation), postoperative pain, complications such as nausea and vomiting, and maternal satisfaction.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Single blind (participant)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Group P: Paracetamol Group | Active comparator | Drug: ParacetamolParticipants receive intravenous paracetamol at a dose of 15 mg/kg infused over 15 minutes immediately after the completion of the subarachnoid block. |
| Group M: Magnesium Sulfate Group | Active comparator | Drug: Magnesium SulfateParticipants receive intravenous magnesium sulfate at a dose of 30 mg/kg administered immediately after the completion of the subarachnoid block. |
Who may qualify
- Ages
- 20 to 40 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult
Key inclusion criteria (5 listed)
- American Society of Anesthesiologists (ASA) physical status class I or II
- Pregnant women aged 20 to 40 years
- Term gestation (>= 37 weeks) with an uncomplicated pregnancy
- Scheduled for elective cesarean delivery under planned spinal anesthesia
- Patient agreement and signed written informed consent
Key exclusion criteria (7 listed)
- Patient refusal
- Morbid obesity (BMI > 35 kg/m²)
- Contraindications to spinal anesthesia
- Significant organ dysfunction (e.g., cardiac, respiratory, renal, or hepatic disorders)
- Known hypersensitivity or allergy to paracetamol or magnesium sulfate
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ParacetamolAdministered intravenously at a dose of 15 mg/kg infused over 15 minutes immediately after the completion of the subarachnoid block. | Drug | Group P: Paracetamol Group |
| Magnesium SulfateAdministered intravenously at a dose of 30 mg/kg immediately after the completion of the subarachnoid block. | Drug | Group M: Magnesium Sulfate Group |
Primary outcome
Post-Spinal Shivering Score
Time frame: Up to 2 hours postoperatively
Post-spinal shivering severity is assessed using a 5-point shivering scale where Grade 0 indicates no shivering; Grade 1 indicates piloerection or peripheral vasoconstriction without visible shivering; Grade 2 indicates muscular activity in only one muscle group; Grade 3 indicates muscular activity in more than one muscle group, but not generalized; and Grade 4 indicates generalized, whole-body shivering. Total scores range from 0 to 4, with higher scores representing greater shivering severity
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 2 Oct 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
The record lists no contact. Use the official record to reach the sponsor.
Questions about this trial
What is this clinical trial studying?
A Phase 4 study testing Paracetamol and Magnesium Sulfate in people with Shivering and Post-Spinal Shivering, run by Assiut University.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 5 inclusion and 7 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: opening soon, as of the sponsor's last update on 2 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 4 studies take place after a treatment is approved, to learn more about its long-term benefits and risks in everyday use.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Post-Spinal Shivering Score (time frame: Up to 2 hours postoperatively). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 2 Oct 2026.