Voltarol (Diclofenac) – Patient Guide (UK)

Voltarol is a brand name for medicines containing diclofenac, an anti-inflammatory pain-relieving drug. It is used to help relieve pain and inflammation in a range of musculoskeletal (muscle and joint) conditions, and it may also be used for certain other painful conditions depending on the form and strength.

This guide explains how Voltarol works, how it’s used, what to expect, and important safety information for people in the United Kingdom.

Quick overview

• Active ingredient: Diclofenac
• Medicinal type: NSAID (non-steroidal anti-inflammatory drug)
• Common forms: Tablets/capsules, gels/ointments (topical), and other strengths depending on the product
• What it helps: Pain relief and reduced inflammation
• Typical onset: Varies by form; topical may start sooner for local pain

How Voltarol works (mechanism of action)

Diclofenac belongs to the NSAID group. It works mainly by reducing the production of prostaglandins—chemicals in the body that contribute to:

• Pain signalling
• Inflammation (swelling and tissue irritation)
• Fever (though this is not the main reason Voltarol is used)

Diclofenac inhibits enzymes called COX-1 and COX-2, which are involved in prostaglandin formation. By lowering prostaglandin levels, it can ease pain and stiffness, and help you move more comfortably.

Pharmacokinetics: how the body handles diclofenac

Pharmacokinetics describes what the body does to a medicine—how it’s absorbed, distributed, metabolised, and eliminated.

Absorption

• Oral forms (tablets/capsules): Diclofenac is absorbed through the gut and then enters the bloodstream.
• Topical forms (gel/ointment): Less diclofenac enters the bloodstream compared with oral products, meaning lower systemic exposure for many people. Absorption is mainly local at the application site.

Distribution

Diclofenac can bind to blood proteins and reaches tissues, including joints, where it helps reduce inflammatory symptoms.

Metabolism

Diclofenac is metabolised primarily in the liver.

Elimination

It is eliminated mainly through the kidneys and also via bile/faeces. People with severe liver or kidney impairment may have altered handling of the drug.

Note: Exact timing and exposure can vary depending on the specific formulation (e.g., immediate-release vs modified/extended-release, gel vs other topical formulations).

What Voltarol is used for (typical indications)

Voltarol may be used to relieve pain and inflammation associated with conditions such as:

• Muscle and joint pain, including sprains and strains
• Back pain and pain related to inflammation in muscles and joints
• Joint pain due to conditions such as osteoarthritis (depending on product/form)
• Rheumatic and inflammatory pain (again, depending on product/form)
• Localized pain (often treated effectively with topical diclofenac gel for affected areas)
• Period-related pain is sometimes treated with certain NSAIDs (not all Voltarol products are suitable; use the product-specific instructions)

Your choice of Voltarol product should depend on the site of pain and the type of symptoms you have. Topical diclofenac is often preferred for pain in a specific area because it targets the site and reduces systemic exposure.

Timing: when to take it and how quickly it may work

Timing differs by formulation. Always follow the instructions provided with your specific product.

General timing guidance

• Oral diclofenac: Many people begin to notice pain relief within 1–2 hours, though this can vary.
• Topical diclofenac: Relief may begin sooner for localized pain, because it is applied directly to the area. It may still take a few days for noticeable improvement in inflammation-related symptoms.

How often

How frequently you can use diclofenac depends on whether it’s immediate-release or modified-release and the strength you’re using. Check the product label or patient information leaflet for exact dosing frequency.

Do not exceed the maximum daily dose for your specific product.

Food and Voltarol: interactions with meals

Oral diclofenac may irritate the stomach for some people. Taking it with food can help reduce stomach upset. However, certain modified-release formulations may have specific instructions.

• Taking with/after food: Often helps reduce the chance of stomach discomfort.
• Empty stomach: May increase risk of indigestion or stomach irritation.

Topical diclofenac (gel/ointment): Food is unlikely to affect absorption because it is applied to the skin.

If you experience indigestion, heartburn, stomach pain, or black stools, stop use and seek medical advice promptly (see Safety profile).

Alcohol and Voltarol: what to know

Alcohol may increase the risk of stomach irritation and bleeding when taking NSAIDs, and may also worsen side effects such as dizziness or nausea.

• Limit alcohol while using diclofenac, especially if you have a history of stomach ulcers, bleeding, or severe indigestion.
• If you drink heavily or regularly, discuss NSAID use with a healthcare professional before continuing.

Do not drink and operate machinery if you feel dizzy or unwell after taking a medicine.

Medicine interactions (important)

Diclofenac can interact with other medicines. This is one reason it’s important to check all your current medicines, including those you can buy without a prescription.

Common medicines that may interact

• Other NSAIDs (e.g., ibuprofen, naproxen, aspirin for pain): increases risk of stomach bleeding and kidney strain.
• Anticoagulants (e.g., warfarin): may increase bleeding risk.
• Anti-platelet medicines (e.g., clopidogrel): may increase bleeding tendency.
• Selective serotonin reuptake inhibitors (SSRIs) (e.g., sertraline, citalopram) and other antidepressants affecting serotonin: may increase risk of gastrointestinal bleeding.
• Corticosteroids (e.g., prednisolone): may increase gastrointestinal side effects.
• Diuretics (water tablets) and ACE inhibitors/ARBs (blood pressure medicines): NSAIDs can reduce kidney function in some people.
• Digoxin, lithium: NSAIDs may raise levels, increasing risk of side effects.
• Methotrexate: NSAIDs can affect methotrexate levels and toxicity risk.
• Cyclosporine/tacrolimus: may increase risk to kidneys.

Practical interaction tips

• Keep a list of your medicines and share it with a pharmacist if you’re unsure.
• Avoid combining multiple NSAIDs (including “cold and flu” products that may contain NSAIDs).
• Remember that interaction risk can differ between oral and topical products; still, it’s safest to check if you take regular medicines.

Dosing: how to take Voltarol safely

Dosing depends on the product type and strength. Always use the dose on the label or in the leaflet supplied with your specific Voltarol medicine.

General principles

• Use the lowest effective dose for the shortest time necessary to control symptoms.
• Do not exceed the maximum daily dose.
• If symptoms do not improve, stop and seek advice rather than continuing indefinitely.

Adults

Many diclofenac products for adults have scheduled dosing (for example, multiple times a day for immediate-release formulations). Topical diclofenac gels/ointments are typically applied in measured amounts to the affected area at defined intervals.

Because strengths vary: please follow the exact directions for your Voltarol product (e.g., “apply X amount” or “take Y mg up to Z times daily”).

Children

Use in children depends on the specific product, strength, and age restrictions printed on the label. If in doubt, check with a pharmacist.

Older adults

Older people may have a higher risk of NSAID side effects such as stomach bleeding or kidney problems. Extra caution is advised, and prompt review is recommended if side effects occur.

Safety profile: who should be careful and what to watch for

Like all medicines, diclofenac can cause side effects. Many people tolerate it well when used correctly, but NSAIDs are associated with specific important risks.

Seek urgent medical help if you notice

• Signs of an allergic reaction: swelling of face/lips, wheezing, severe rash, difficulty breathing
• Signs of stomach or bowel bleeding: vomiting blood, black/tarry stools, severe stomach pain, dizziness/fainting
• Signs of serious skin reactions: blistering rash, peeling skin, mouth sores
• Chest pain, shortness of breath, weakness on one side (possible vascular event)
• Reduced urine output or severe swelling (possible kidney issue)

Common side effects

• Indigestion, heartburn, nausea (more common with oral forms)
• Headache, dizziness (variable)
• Skin irritation at application site (for topical forms)
• Mild abdominal discomfort

Who should avoid diclofenac or get advice first

You should take special care and seek professional advice before using diclofenac if you:

• Have a history of stomach ulcers or gastrointestinal bleeding
• Have heart disease, stroke history, or significant cardiovascular risk
• Have uncontrolled high blood pressure
• Have kidney disease or reduced kidney function
• Have liver disease or abnormal liver tests
• Have asthma that worsens with NSAIDs
• Are taking medicines that increase bleeding or affect kidney function (see interaction section)
• Are pregnant (NSAIDs are generally not recommended in later pregnancy; follow product leaflet guidance)

Note: This list is not exhaustive. The safest approach is to read your product’s leaflet carefully and consult a pharmacist if you have any uncertainty.

Practical use tips (to get the most benefit and reduce risks)

Topical Voltarol (gel/ointment) – apply correctly

• Apply only to intact skin (not broken or infected skin).
• Wash hands after application unless your hands are the treated area.
• Avoid contact with eyes and mouth.
• Do not cover with tight bandages unless advised.
• Let it dry before covering with clothing.
• Keep away from heat sources such as hot water bottles or heating pads on the treated area.

Oral Voltarol (tablets/capsules) – consider stomach protection

• Take with food or after meals if you get indigestion.
• Avoid taking other NSAIDs at the same time.
• If you are taking medicines for stomach acid, follow the planned regimen unless advised otherwise.

How long to try it

• If pain is not improving after a reasonable period (often a few days to 1–2 weeks depending on condition and product), stop and seek advice.
• Seek further evaluation earlier if pain is severe, persistent, or associated with fever, unexplained weight loss, or injury with worsening symptoms.

Keep a symptom diary

Tracking pain level, stiffness, and mobility can help you and a healthcare professional decide whether to continue, adjust, or switch treatment.

Alternatives to Voltarol

There are several options for pain and inflammation relief. The best choice depends on your symptoms, medical history, and the area of pain.

Other NSAIDs

• Ibuprofen, naproxen, or other diclofenac products may be alternatives.
• Do not combine multiple NSAIDs unless specifically advised.

Topical non-NSAID options

• Topical capsaicin for certain types of nerve-related pain (not the same as anti-inflammatory pain).
• Menthol-type rubs may help with temporary muscle discomfort.

Non-medicine approaches

• Heat or cold therapy (e.g., cold packs for new injuries; heat for muscle tightness—follow safety guidance)
• Gentle stretching and graded activity
• Physiotherapy or exercise programmes, especially for back and joint pain
• Supportive measures such as posture changes or braces where appropriate

Pain relief medicines outside NSAIDs

• Paracetamol (acetaminophen) may be suitable for some people, particularly if NSAIDs are not tolerated.
• Paracetamol helps pain but is generally less effective for inflammation compared with NSAIDs.

Your pharmacist can help you compare suitability and safety based on your health history.

UK market and legal context (brief overview)

Medicines containing diclofenac are widely used in the UK. Availability can vary depending on the formulation:

• Some diclofenac products may be available from pharmacies and retailers for self-care.
• Other strengths or formulations may require additional clinical oversight depending on product classification and local availability.

In the UK, medicines are regulated by the Medicines and Healthcare products Regulatory Agency (MHRA) and safety information is supported by ongoing pharmacovigilance. NSAIDs are monitored for risks such as gastrointestinal bleeding and cardiovascular events, and advice may evolve as new evidence becomes available.

Recent guidance and safety considerations (what to bear in mind)

Across the UK, healthcare advice for NSAID use commonly emphasises:

• Short-term use at the lowest effective dose
• A careful assessment in people at higher risk (e.g., history of ulcer/bleeding, kidney impairment, cardiovascular risk)
• Awareness that NSAIDs can increase risk of serious events, especially with higher doses or prolonged use

Because evidence and regulatory messaging can change over time, always read the current product leaflet and follow pharmacy guidance. If you have recurring pain, repeated use should be discussed with a healthcare professional rather than continuing indefinitely.

Delivery and availability (UK online pharmacy)

Voltarol (diclofenac) may be available online from UK pharmacies depending on stock status, product type, and whether the specific product is classified for supply as an over-the-counter medicine or pharmacy-only medicine.

What you can expect

• Availability: Stock levels can vary by strength and form (gel vs tablets).
• Delivery: Delivery times depend on the courier service and your location within the UK.
• Packaging: Medicines are typically supplied in sealed packaging with a patient information leaflet.

For the smoothest delivery, ensure your address and contact details are accurate. If you need delivery to an alternative address, follow the checkout instructions provided by the pharmacy.

Product information summary

FAQ – Voltarol (Diclofenac)

1) Is Voltarol a painkiller or an anti-inflammatory?

Voltarol contains diclofenac, an NSAID. It works both as a pain reliever and as an anti-inflammatory medicine by reducing prostaglandins.

2) How fast does Voltarol work?

It depends on the form. Oral diclofenac often starts working within 1–2 hours. Topical diclofenac gel can help more quickly for localized pain, but noticeable improvement may still take a few days.

3) Can I use Voltarol with other pain medicines?

You should generally avoid combining it with other NSAIDs. Paracetamol is often used with NSAIDs in some cases, but check your products and health situation. If you’re unsure, ask a pharmacist.

4) Does Voltarol interact with blood thinners?

NSAIDs can increase bleeding risk when taken with anticoagulants (e.g., warfarin) or some anti-platelet medicines. If you take these medicines regularly, seek advice before using diclofenac.

5) Can I drink alcohol while using Voltarol?

It’s best to limit alcohol while taking diclofenac, because alcohol may increase the risk of stomach irritation or bleeding.

6) Should I take Voltarol on an empty stomach?

Oral forms may cause more stomach upset when taken without food. Taking it after food or with food may reduce indigestion. Always follow the leaflet for your specific product.

7) Is topical Voltarol safer than tablets?

Topical diclofenac usually results in lower blood levels than oral diclofenac, which may reduce systemic side effects. However, it can still cause side effects (particularly local skin reactions) and interactions can still be relevant for some people.

8) What should I do if I get side effects?

If you experience mild side effects like stomach upset, stop if symptoms are severe or persistent and seek advice. For serious signs—such as black stools, vomiting blood, severe rash, wheezing, or chest pain—get urgent medical help.

9) How long can I use Voltarol?

Use it for the shortest time necessary at the lowest effective dose. If symptoms don’t improve, or you need repeated courses, you should seek advice.

10) Who should not use diclofenac?

People with certain conditions (such as a history of NSAID-related allergy or asthma exacerbations, ulcer/bleeding history, significant kidney or liver problems, or certain pregnancy stages) should not use diclofenac or should get guidance first.

Always read the patient information leaflet supplied with your Voltarol product. If you are unsure which strength or form is appropriate for your symptoms, a pharmacist can help you choose the safest option.