An interventional study of Lidocaine, a local anaesthetic. and Parecoxib 40mg in Preventing Propofol Pain on Injection, sponsored by Oman Medical Speciality Board. Not yet recruiting. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-08-11.
Sponsored by Oman Medical Speciality Board · Not applicable, Interventional, and Prevention
Propofol is the most popular IV anaesthetic agent used for induction, however one of its known side effects is causing pain on injection, the gold standard method in preventing this pain is using lidocaine prior to injecting propofol. multiple drugs have been investigated to reduce the aforementioned pain, however there has been no study comparing lidocaine to parecoxib, an NSAID.
Propofol is the most popular drug used for induction of anaesthesia. without prophylaxis, 60 to 70% of patients are affected by pain upon injection, with varying degrees of severity. The specific mechanism triggering pain is undetermined, but it is thought to be due to triggering of kallikrein-kinin cascade when it is injected.
Many strategies have been investigated to reduce the severity of this pain, with the most effective being the use of a large vein to deliver the drug, combined with pretreatment using lidocaine with venous occlusion to allow it to anaesthetize the vein locally. This approach has been shown in a large meta-analysis to be the gold standard for reducing pain caused by propofol injection, achieving up to an 80% reduction in incidence. However, this method is not widely used clinically, probably due to the extra time required to anaesthetize the vein and applying a tourniquet. On the other hand, using lidocaine as a pre- treatment or mixed with propofol has been shown to reduce pain on injection.
Multiple other agents have been investigated with the aim of preventing the pain caused by propofol injection, such as opioids and ketamine. Non-steroidal Anti inflammatory Drugs (NSAIDs) have also been studied, with the rationale that reducing prostaglandin production caused by the suggested cascade above. These medications are usually used as part of the multimodal analgesia delivered to the patient to prevent intraoperative and postoperative pain, if given prior to propofol, they may have the added benefit of reducing the pain caused by injecting propofol.
Parecoxib, a selective COX-2 inhibitor in the NSAIDs class, has been investigated recently in trails to prevent pain on injection caused by propofol, where a prospective Randomised controlled trial showed that a dose of 40 mg was effective in reducing the frequency and the severity of the pain, where the incidence of pain was only 26%, compared to 58% in the placebo group. Furthermore non of the patients in this group reported moderate or severe pain. In the same study, a 20 mg Dose was only shown to reduce the severity of pain and not the incidence.
The Investigators propose this study to compare the two interventions as no previous study has investigated them in the same setting.
Objective of the study.
To compare the efficacy of intravenous parecoxib versus lidocaine in reducing pain during propofol injection in adult ASA I-II patients.
10,054 studies on the registry are indexed under Pain; 1,649 are open to participants now.
This study's planned enrollment of 30 is below the median of 66 across 8,493 interventional studies indexed under Pain.
Browse Pain studies →Oman Medical Speciality Board is the lead sponsor of 15 studies on the registry; 10 are open to participants now.
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Exclusion Criteria:
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How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
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Contraindication
A reason a treatment, test or procedure should not be given to a particular person, such as an allergy, another illness or a medicine they take.
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Patients in this group will receive IV parecoxib 40 mg (the standard full dose for an adult) diluted to a total volume of 5 mL with normal saline. The study drug will be injected into the IV cannula on the dorsum of hand \*\*with a tourniquet applied\*\* on the mid-arm (upper forearm) to occlude venous return. The tourniquet (elastic band) pressure will be just enough to distend veins (similar to when drawing blood) but not cause excessive discomfort. The parecoxib solution will be given over \~5-10 seconds. The tourniquet will remain in place for \*\*2 minutes\*\* after injection, then released. This technique of venous occlusion is borrowed from Bier block and previous studies, aiming to localize the drug in the vein for a short period to maximize local effect. then propofol will be administered.
Drug: Parecoxib 40mg
Patients in this group will receive IV lidocaine at a dose of 0.5 mg/kg (ideal body weight) up to a maximum of 50 mg, diluted to a total of 5 mL. The lidocaine will be given into the hand IV cannula \*\*with a tourniquet\*\* on the forearm, It will likewise dwell for 2 minutes under occlusion before tourniquet release. This tourniquet method for lidocaine is known to significantly improve its efficacy in preventing injection pain
Drug: Lidocaine, a local anaesthetic.
it will be given as a pretreatment prior to injection of propofol, with a tourniquet applied.
atients in this group will receive IV parecoxib 40 mg (the standard full dose for an adult) diluted to a total volume of 5 mL with normal saline.
incidence of pain on injecting propofol after receiving the treatment assigned.
Time frame: immediately after injection of 50 mg of propofol.
Severity of pain.
Measured Via Visual analogue scale for pain. The patient will be given 50 mg of propofol and asked if there is any pain, and the severity of the pain. The severity of pain will be graded on the scale between 1 and 10, 10 being the most severe in the scale, and 1 is the minimal pain experienced.
Time frame: immediately after injection of propofol.
No study locations are listed for this record.
Plan to share: No
Start is estimated for Aug 2025; primary completion for Dec 2026, 16 months later.
Of 3,731 non-industry interventional studies with no phase under Pain, half reached primary completion within 10 months of starting (the median), counting those still running; a quarter within 4 and three quarters within 23. This study's planned 16 months is above that.
Counting every sponsor, half of 3,830 studies reached it within 10 months; a quarter within 4 and three quarters within 23.
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This study is not yet recruiting, as verified in Aug 2025. You cannot join it, but the record below documents what was studied.
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Studies of the drug tested here: Parecoxib
Oman Medical Speciality Board