Soludol

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Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Soludol

Property Description
Active ingredient Diclofenac (Sodium or Potassium)
Form Oral Tablet, Capsule, or Dispersible Tablet
Pharmacological class Nonsteroidal Anti-Inflammatory Drug (NSAID)
Common use Reduction of pain and inflammation
Origin Synthetic, Phenylacetic Acid derivative

What Type of Medicine is Soludol?

Soludol is an oral pharmaceutical preparation whose active substance is Diclofenac, which is officially classified as a Nonsteroidal Anti-Inflammatory Drug (NSAID). This compound is a synthetic agent belonging to the phenylacetic acid chemical class. Soludol is distinct in that it is often provided in a rapidly dissolving form, focusing on the acute relief of discomfort. It is clinically recognized for its role in controlling inflammatory mediators.

Soludol Composition and Available Forms

The core of Soludol is the single active ingredient, Diclofenac, utilized as either the Sodium or Potassium salt, with the latter often favored for quicker systemic delivery. Soludol is primarily intended for adult use and is available in several forms for oral administration, including the standard Tablet, Capsule, and the specialized Dispersible Tablet, which allows the dose to be dissolved in liquid. The product combines the active salt with appropriate pharmaceutical excipients to ensure a stable and effective solid dose.

General Purpose and Mechanism Summary

The general purpose of Soludol is to mitigate the physical symptoms of inflammation and acute pain. This therapeutic action is achieved through its primary mechanism of effect: the potent inhibition of cyclooxygenase enzymes (COX-1 and COX-2). This process reduces the body’s synthesis of prostaglandins, which are the chemical messengers responsible for initiating and propagating pain signals. By limiting the generation of these inflammatory compounds, the drug offers the general benefit of reducing swelling, easing stiffness, and decreasing the severity of pain.

What side effects are possible with Soludol?

Possible side effects and safety information

The safety profile for Diclofenac (Soludol) is formally defined by regulatory agencies across distinct domains, including categorized adverse reactions, potential serious events, and specific safety restrictions.

Adverse Reaction Scope and Frequency Classification

The possible side effects are officially categorized by their frequency and the system-organ class (SOC) affected. Common reactions, observed in 1 to 10 users in every 100, generally involve the Gastrointestinal Disorders (e.g., nausea, dyspepsia, abdominal pain, diarrhoea) and the Nervous System (e.g., headache, dizziness). Effects on the liver, evidenced by increased transaminases, are also classified as common.

Uncommon and Rare adverse reactions are also officially documented. Rare reactions include severe hypersensitivity reactions and occurrences of Gastrointestinal Haemorrhage or Ulceration.

Serious Adverse Reactions and Safety Constraints

The regulatory safety profile highlights the risk of several serious adverse reactions, which, while rare, are considered clinically significant.

  • Serious Cardiovascular Events: Documented risk of major thrombotic events, including Myocardial Infarction and Stroke. This risk may increase with higher doses and longer duration of use.
  • Serious Gastrointestinal Events: Potential for serious and potentially fatal events, including bleeding, ulceration, or perforation of the stomach or intestines, which can occur at any time during therapy.
  • Severe Dermatological Reactions: Very rare but severe skin conditions, such as Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN), are documented, with patients being at highest risk early in treatment.

Population- and Duration-Specific Safety Notes

Safety statements include specific considerations for vulnerable populations. Elderly patients are recognized in regulatory documents as being at a greater risk for serious gastrointestinal adverse events. Furthermore, the use of this medicine is formally contraindicated in patients with established ischaemic heart disease or severe heart failure, and its use is prohibited for pain management following Coronary Artery Bypass Graft (CABG) surgery.

Overdose and Emergency Response

Overdose and When to Seek Help for Soludol (Diclofenac)

Any suspected overdose involving Soludol mandates the seeking of immediate medical attention. Urgent help must be sought for severe or life-threatening manifestations, including seizures, signs of gastrointestinal bleeding, or profound central nervous system (CNS) effects. Management should include contacting a certified Poison Control Center for specialized guidance.

Documented Clinical Manifestations

Official regulatory documents list the following presentations in overdose:

  • Gastrointestinal Effects: Nausea, vomiting, abdominal pain, diarrhea, and potential bleeding.
  • CNS Effects: Drowsiness, headache, dizziness, and confusion. Severe intoxication may present with seizures or coma.
  • Systemic Toxicity: Potential for acute renal decompensation, liver damage, and cardiovascular effects like tachycardia.

Severe Outcomes and Management

The most severe outcome documented is the risk of gastrointestinal perforation and bleeding, which may be fatal. Organ damage, including liver or kidney failure, is also noted. The regulatory basis for treatment confirms that no specific antidote is known. Overdose management is limited to providing symptomatic and supportive care. Decontamination procedures, such as the use of activated charcoal, may be considered for patients who have recently ingested a significantly large overdose. The official labeling notes that GI adverse events are generally more serious and potentially fatal for elderly patients.

Therapeutic Uses of Soludol

What Soludol Treats: Main Uses and Benefits

Soludol is commonly used across domains where additional symptomatic support is needed, primarily for conditions involving pain and inflammation. This therapeutic assistance generally helps ease the overall symptom burden in acute and chronic scenarios.

Soludol is generally considered relevant in conditions presenting with systemic or localized discomfort, helping address symptom clusters that may become intense or disruptive. It is commonly used across conditions like Osteoarthritis, Rheumatoid Arthritis, acute migraine attacks, and primary dysmenorrhea (menstrual cramps).


Quick Fact: Relief for Pain and Swelling

Soludol is applied in addressing symptoms that interfere with daily comfort, such as localized joint pain, tenderness, and swelling, following physical trauma or in chronic inflammatory states.


The medication is applicable within clinical settings that involve acute or disruptive symptom patterns, and may contribute to easing discomfort during periods of heightened symptoms. This use provides supportive relief that helps patients cope more steadily with symptom fluctuations, and may assist with maintaining functional stability.

Eligibility and Restrictions for Use

Official Eligibility and Contraindications

Use of Soludol (Diclofenac) is subject to strict eligibility rules as defined by regulatory labeling. The medicine is contraindicated for patients with a known hypersensitivity to the drug, aspirin, or any other Nonsteroidal Anti-Inflammatory Drug (NSAID), including those with a history of aspirin-sensitive asthma. Absolute prohibitions also apply to individuals with active gastrointestinal ulceration, bleeding, or perforation.

Eligibility is limited by specific severe health conditions. The drug must not be used by patients with severe heart failure (NYHA class II–IV), established ischaemic heart disease, or cerebrovascular disease. It is also strictly contraindicated in cases of severe hepatic or renal failure, and for the management of perioperative pain following Coronary Artery Bypass Graft (CABG) surgery.

Age and Physiological Restrictions

Systemic use is not generally recommended for children under 12 years of age, as safety and efficacy have not been established for this population group. Regarding pregnancy, the medicine is contraindicated in the last trimester (starting at 30 weeks gestation). Patients with mild to moderate organ impairment or significant cardiovascular risk factors require the use of the lowest effective dose under medical monitoring.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Soludol (Diclofenac)'s interaction profile requires careful review, as documented in official regulatory sources. Concomitant use with several classes of medications can significantly alter drug exposure or increase the risk of serious adverse effects.


Documented Pharmacological Interactions

Interaction Type Interacting Agents / Classes Constraint / Outcome
Increased Bleeding Risk Other NSAIDs, Anticoagulants, SSRIs, Corticosteroids Co-administration increases risk of gastrointestinal bleeding/ulceration.
Drug Level Modulation Lithium, Digoxin, Methotrexate, Phenytoin May raise plasma concentrations of these co-administered drugs by affecting renal excretion or metabolism.
Antihypertensive Interference Diuretics, ACE Inhibitors, Beta-blockers May reduce the therapeutic effect of these agents by inhibiting prostaglandin synthesis.
Nephrotoxicity Risk Ciclosporin, Tacrolimus Increased risk of kidney toxicity when combined with Soludol.

Important Interaction Constraints

Contraindications include use with other systemic NSAIDs and within 8 to 12 days following the administration of Mifepristone. Use in the setting of peri-operative pain for CABG surgery is also contraindicated. Co-administration with substances that inhibit CYP enzymes (e.g., Voriconazole) may lead to elevated Soludol exposure, necessitating caution. Alcohol consumption should be avoided due to the increased risk of gastrointestinal bleeding.

Mechanism of Action

The mechanism of Soludol (Diclofenac) is defined by multimodal action, focused on targeted enzyme inhibition and the resulting modulation of inflammatory and nociceptive signaling cascades.

Inhibition of Prostaglandin Synthesis

Soludol’s principal mechanism is the competitive inhibition of the cyclooxygenase ( COX) enzymes, preferentially COX-2, which are key biological targets in the arachidonic acid cascade. This action blocks the molecular conversion necessary for synthesizing prostaglandins, which are critical chemical mediators of inflammation and nociception. The resulting reduction of mediators, particularly PGE2, limits the chemical signals that promote fluid extravasation and allows for the activation of heat-dissipating mechanisms via central PGE2 adjustment.

Modulation of Nociceptive Signaling

Beyond COX inhibition, the drug engages mechanisms that influence sensory nerve activity. This is accomplished by modulating the excitability of peripheral nociceptors (pain receptors) through pathways such as ATP-sensitive potassium ( KATP) channels and antagonism of certain P2X receptors. This mechanism contributes to a suppression of the initiation and transmission of nociceptive signals.

Mechanistic Persistence in Tissue

The molecular properties of the active ingredient enable it to concentrate and persist in inflamed tissue (e.g., synovial fluid) at levels higher than those found in the plasma. This characteristic supports sustained local action on inflammatory mediators, which is defined by a longer duration of anti-inflammatory pathway modulation.

Dosage and Administration Information

How to Use Soludol Dispersible Tablets

Soludol (diclofenac) is provided as a dispersible tablet, and official instructions specify the exact procedure for its preparation and consumption to ensure proper administration. The correct use of this medicine is defined by its preparation method, dosing frequency, and administration timing.


Preparation and Administration

  • Method: The tablets should be dispersed in a glass of water. Stir the water until the tablet is completely dissolved or dispersed.
  • Route: The resulting solution must be drunk immediately after the tablet has fully dispersed, administering the medicine via the oral route.
  • Timing: The drug should be taken with or after meals.

Dosing and Age Restrictions

The dosage for Soludol must be strictly followed as prescribed by a healthcare professional. The standard official guidelines for adults are as follows:

Administration Detail Official Instruction
Dose (Adults) 1 tablet per dose
Frequency (Adults) 2 or 3 times a day
Pediatric Use Should not be used in children below 14 years of age

Missed Dose

If a dose is missed, take it as soon as you remember. If it is almost time for the next scheduled dose, skip the missed dose and resume the regular dosing schedule. Do not double the dose to make up for the missed one.

Recent Clinical Evidence

Research evidence / Overview of studies for Soludol

Evidence for Symptomatic Relief in Osteoarthritis and Rheumatoid Conditions

The research structure for conditions characterized by functional limitations, such as Osteoarthritis (OA) and Rheumatoid Arthritis (RA), involves numerous controlled studies, including Randomized Controlled Trials (RCTs). These short- to intermediate-term studies research examined a comparison of outcomes reported in populations receiving the active drug versus a placebo or other medications. Researchers primarily applied in studies examining patient-reported experiences, such as outcomes related to physical discomfort and reduction in joint stiffness, using standardized tools like the WOMAC index. Study populations included adults, often older adults, with diagnosed OA or RA in the knee or hip.

Findings describe patterns observed in the studies, based on patient-reported outcomes describing perceived symptoms and activity level that were monitored over defined time intervals. Research describes patterns measured during the study period, primarily focusing on outcomes linked to systemic or functional imbalance.

Regulatory Assessments and Evidence Synthesis

Due to the drug’s long history and the volume of research, Systematic Reviews and Network Meta-Analyses have been performed. These studies are applied in research contexts involving fluctuating or unstable symptoms to consolidate the information from multiple primary trials. The evidence contributes to the broader evidence landscape by summarizing the consistency of symptomatic measurements reported across different trials, which is an important step in regulatory and clinical guideline body assessments.


Evidence for Acute Pain Management: Migraine and Menstrual Pain

Research was conducted for conditions characterized by fluctuating or episodic manifestations, such as acute migraine attacks and primary dysmenorrhea (menstrual pain). Studies focusing on episodes where symptoms become more noticeable primarily used Randomized, Placebo-Controlled Trials, particularly with rapid-release formulations. The main goal was to measure outcomes describing perceived discomfort, such as the time needed to record a pain-free status or the proportion of patients who avoided using additional (rescue) medication within a few hours. Findings describe patterns observed in the studies related to outcomes describing episodic or acute changes during the study period.


Research Gaps and What Remains Uncertain

Evidence for long-term effects remains limited beyond intermediate study periods. Data for long-term usage patterns often come from observational settings, but the evidence remains limited regarding the sustained symptomatic changes over many years. Furthermore, comparative evidence against non-pharmaceutical interventions is lacking in some research scenarios.

Populations Underrepresented in Clinical Trials

Research has been concentrated on adult populations, but data for certain groups remain insufficient. For instance, specific protocols for children or adolescents, or comprehensive evidence for adults with multiple significant co-existing conditions, may be limited or findings were mixed across various studies. The results apply only to the populations studied, meaning caution is warranted when applying study findings to groups where evidence is limited.

Key Studies & References

  1. Clinical Pharmacology of Diclofenac (Review discussing trials for RA, OA, migraine, dysmenorrhea)
  2. Safety review of diclofenac (TGA document detailing evidence base for chronic and acute indications)
  3. Diclofenac (oral route): MedlinePlus Drug Information (Source for acute pain, RA, OA, and dysmenorrhea indications)

Frequently Asked Questions (FAQ)

Common questions about Soludol (FAQ)

Q: Where should I store my Soludol capsules?

Official regulatory information advises storing the capsules at room temperature. The product label advises that the medication should be kept in the original container, out of the sight and reach of children.

Q: Can I drink alcohol while taking Soludol?

Official product information cautions against the consumption of alcohol while taking this medicine. Alcohol can increase side effects such as feeling dizzy or excessively sleepy. Combining the two can increase the depressant effects on the central nervous system.

Q: Does it make you sleepy or affect my driving?

Regulatory documents indicate that this medicine commonly causes dizziness and somnolence (sleepiness). These effects may impair a person's ability to operate complex machinery or drive safely. Patients are cautioned to avoid driving or operating machinery until they know how the medicine affects them.

Q: Who should not take Soludol?

According to official regulatory sources, this medicine should not be taken by patients who have known hypersensitivity (an allergy) to the active substance, pregabalin, or any of the inactive ingredients (excipients) listed in the product label.

Q: What are the indications (what is it approved for)?

Official product information states that this medicine is approved for several specific conditions. These include the management of certain types of neuropathic pain (nerve pain), such as that associated with diabetic peripheral neuropathy, postherpetic neuralgia, and spinal cord injury. It is also approved for fibromyalgia and as an add-on treatment for partial-onset seizures.

Q: Can children 2 years old use it?

The official product information specifies that the safety and effectiveness of this medicine have not been established in children below the age of 12 years for pain and fibromyalgia indications. However, for the treatment of partial-onset seizures, it is indicated for use in patients starting from 1 month of age and older. Use in any age group must be strictly according to the approved product label for that specific condition.

Q: What happens if I stop taking it suddenly?

Official regulatory information warns against stopping this medicine abruptly. Following sudden discontinuation, some patients reported symptoms including insomnia (difficulty sleeping), headache, anxiety, nausea, and diarrhea. Official guidance indicates that if discontinuation is necessary, the dose should be tapered gradually.

How should Soludol be stored and disposed of?

Official Storage and Disposal Requirements

Storage Conditions and Security

Soludol, which contains an opioid (Codeine) and Paracetamol, must be stored in its original container at controlled room temperature (typically between 20 C and 25 C). The medicine must be protected from excessive heat, moisture, and direct light, and it should never be frozen. Due to the risk of fatal accidental ingestion, the regulatory label mandates that the product be kept securely, out of the sight and reach of children and pets at all times.

Disposal Requirements

The most appropriate method for disposing of unused or expired Soludol is through an official drug take-back program or a DEA-authorized collection site, such as those often found at pharmacies or police stations. If these take-back options are not immediately available, and to prevent potential harm from misuse, the FDA advises to immediately flush the unused medicine down the toilet. This procedure applies specifically to certain controlled substances like Codeine that pose an especially high risk of accidental ingestion or diversion.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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