Muscle and joint pain pills: which ones help and how to choose

Musculoskeletal pain is heterogeneous in its causes and mechanisms, so the choice of systemic tablets is always secondary to non-drug measures and topical agents. In acute conditions involving soft tissue damage and osteoarthritis, topical nonsteroidal anti-inflammatory drugs are the first line of treatment, with tablets added when topical forms are insufficient or unavailable. In all cases, the minimum effective dose and short course of treatment apply. [1]

In osteoarthritis in adults, current guidelines recommend caution with systemic analgesics: paracetamol is not prescribed routinely due to its weak analgesia, weak opioids are only allowed occasionally when other options are ineffective, and when prescribing oral nonsteroidal anti-inflammatory drugs, gastrointestinal, cardiovascular, and renal risks must be taken into account. [2]

For acute non-convulsive limb injuries in adults, it is recommended to prioritize topical non-steroidal anti-inflammatory drugs and avoid opioids; if tablets are required, a short course of non-steroidal anti-inflammatory drugs or paracetamol provides a clinically significant effect with a better safety profile. [3]

When pills don't solve the problem: "Red flags"

Urgent care is needed for acute hot, red and swollen joints, high fever or severe systemic symptoms, since until septic arthritis is ruled out, any painkillers will mask the picture and delay proper treatment. [4]

Sudden joint deformity, loss of support, increasing neurological symptoms, significant trauma, rapidly increasing swelling, and, in children, any acute joint swelling associated with fever also require immediate examination. [5]

Table 1. Red flags for which pills are not the solution

Situation	Why is it dangerous?	What to do
Hot, red, swollen joint, severe pain	High risk of septic arthritis	Seek immediate medical attention and rule out infection before taking systemic analgesics.
Acute deformation, inability to support	Fracture, dislocation, ligament rupture	Do not put any load on the limb, urgent visualization
Neurological deficit, weakness, impaired urinary control	Compression of nerve structures, cauda equina syndrome	Urgent assessment by a specialist
Severe fever, chills	Systemic infection or inflammation	Urgent diagnostics
The child has acute joint swelling and a fever.	Orthopedic emergency	See a doctor immediately

Based on current clinical guidelines for hot joint and emergency situations in rheumatology and general practice. [6]

First lines of systemic therapy

Paracetamol. Safe for short-term use at standard doses, but provides limited pain relief for osteoarthritis and a range of musculoskeletal pain conditions, so it is not considered routine monotherapy. The maximum daily dose for a healthy adult is 4,000 mg from all sources, but with long-term use, a safer target is 3,000 mg per day, and for liver disease, 2,000 mg. [7]

Oral nonsteroidal anti-inflammatory drugs. Ibuprofen, naproxen, diclofenac, and selective cyclooxygenase-2 inhibitors are effective for the inflammatory component of pain. Risks include gastrointestinal bleeding, cardiovascular events, and drug-induced deterioration in renal function. Prescribe minimal doses for a short period; in patients at high gastrointestinal risk, add a proton pump inhibitor; and in patients with chronic kidney disease and cardiovascular disease, carefully evaluate the benefit-risk ratio. [8]

Selective cyclooxygenase-2 inhibitors reduce the risk of gastrointestinal complications compared to non-selective drugs, but retain cardiovascular risks. Selective drugs are appropriate for high gastrointestinal risk and low cardiovascular risk, while the minimum dose and short course of treatment remain mandatory. [9]

Table 2. Starting doses and limits for common tablets

Preparation	Typical starting doses	Maximum per day	Key Notes
Paracetamol	500-1000 mg every 6-8 hours	4,000 mg, preferably ≤ 3,000 mg for frequent use	In case of liver disease, limit to 2,000 mg; risk of overdose when combined with combination drugs
Ibuprofen	200-400 mg every 6-8 hours	1,200 mg without a prescription; higher doses may be used for short periods if prescribed	Consider gastrointestinal, cardiovascular and renal risks
Naproxen	250-500 mg twice daily	1,000 mg	May have a more neutral thrombogenic risk profile, but still adhere to the short course principle
Diclofenac	50 mg two to three times a day	150 mg	Assess cardiovascular risks, use minimal doses
Celecoxib	100 mg twice daily or 200 mg once daily	400 mg	Preferred for high gastrointestinal risk and low cardiovascular risk

Dosages and restrictions are summarized from current safety regulations and clinical guidelines. [10]

Selection of tablets for typical clinical situations

Osteoarthritis of the knee and hip joints. The basis remains education, physical therapy, and weight control. If systemic tablets are necessary, short-term nonsteroidal anti-inflammatory drugs with gastroprotection are chosen in the at-risk group; paracetamol is not used routinely; duloxetine may be added for persistent pain. [11]

Acute soft tissue injury. Initially, topical nonsteroidal anti-inflammatory drugs (NSAIDs) are used. If systemic therapy is required, a short course of oral NSAIDs or paracetamol may help reduce pain and speed return to activity; opioids are not recommended. [12]

Non-specific low back pain. Non-pharmacological treatments are the first choice; if necessary, a short course of non-steroidal anti-inflammatory drugs is acceptable. Skeletal muscle relaxants may reduce pain in the first few days, but they offer little improvement in function and often cause side effects, so their use should be selective and brief. [13]

Chronic widespread pain and fibromyalgia. Systemic nonsteroidal anti-inflammatory drugs are usually ineffective; consider duloxetine or tricyclic antidepressants as part of a multimodal approach, with priority given to non-pharmacological methods. [14]

Table 3. Quick selection by situation

Situation	What comes first?	When to add tablets	What to choose
Osteoarthritis	Training, exercise, weight control	Pain interferes with activity	Nonsteroidal anti-inflammatory drugs (NSAIDs) briefly; if there is a risk of gastrointestinal complications, add a proton pump inhibitor; duloxetine for persistent pain
Acute soft tissue injury	Local nonsteroidal anti-inflammatory drugs, rest, gradual loading	Not enough effect	A short course of oral nonsteroidal anti-inflammatory drugs or paracetamol
Lower back pain	Activity, heat treatments, training	Short-term pharmacotherapy	Nonsteroidal anti-inflammatory drugs; briefly muscle relaxants in selected patients
Fibromyalgia	Physical activity, cognitive-behavioral methods	In case of severe pain	Duloxetine or tricyclic antidepressants, individual selection

Summary table of current recommendations. [15]

Adjuvant drugs: when appropriate

Duloxetine is able to reduce chronic nociceptive and mixed pain in osteoarthritis and chronic low back pain, especially with concomitant depression or hyperalgesia; it is used as an adjunct to basic therapy. [16]

Tricyclic antidepressants and serotonin-norepinephrine reuptake inhibitors have evidence of efficacy in a range of chronic pain syndromes, but require assessment of tolerability and risk of drug interactions. [17]

Neuropathic pain medications are appropriate for those with a clear neuropathic component rather than purely nociceptive musculoskeletal pain; refer to specialized guidelines for neuropathic pain. [18]

Table 4. Adjuvant tablets and key notes

Class	When to consider	Notes
Duloxetine	Osteoarthritis with persistent pain, chronic low back pain	May reduce pain and improve function, assess tolerance
Amitriptyline and other tricyclics	Chronic pain syndromes with sleep disturbances	Increase the risk of side effects, titrate the dose
Drugs for neuropathic pain	Neuropathic component	Follow specialized guides on neuropathic pain

Generalization from modern sources. [19]

Security: Risks and Interactions Often Overlooked

All oral nonsteroidal anti-inflammatory drugs increase the risk of cardiovascular events, possibly within the first few weeks of use; the risk is higher in patients with existing cardiovascular disease. Use minimal doses for short periods and assess your individual risk. [20]

Renal risks are increased with the combination of an angiotensin-converting enzyme inhibitor or angiotensin receptor blocker plus a diuretic plus a nonsteroidal anti-inflammatory drug—a known combination with a high risk of acute kidney injury. Avoid this triple combination, especially during the first weeks of therapy, and monitor creatinine and potassium in susceptible patients. [21]

Ibuprofen may reduce the antithrombotic effect of low-dose aspirin if taken at the wrong time; if concomitant administration is necessary, maintain intervals to maintain the cardioprotection of aspirin.[22]

Selective serotonin reuptake inhibitors and nonsteroidal anti-inflammatory drugs (NSAIDs) together increase the risk of gastrointestinal bleeding; in such patients, the threshold for prescribing a proton pump inhibitor should be low.[23]

Paracetamol is generally safe, but exceeding the total daily dose and combining it with alcohol or chronic liver disease increases the risk of hepatotoxicity; carefully calculate the total dose of all drugs.[24]

Table 5. Dangerous combinations and what to do

Combination	What is the risk?	How to reduce the risk
Angiotensin-converting enzyme inhibitor or angiotensin receptor blocker + diuretic + nonsteroidal anti-inflammatory drug	Acute kidney injury, hyperkalemia	Avoid; if necessary, monitor creatinine and potassium, maintain hydration
Nonsteroidal anti-inflammatory drug + selective serotonin reuptake inhibitor	Gastrointestinal bleeding	Add a proton pump inhibitor, consider an alternative
Ibuprofen with low-dose aspirin without intervals	Loss of aspirin cardioprotection	Split the doses according to the recommendations.
Nonsteroidal anti-inflammatory drug in a patient with atherosclerosis	Cardiovascular events	Minimum dose, short course, individual risk assessment
Paracetamol in a high total dose	Hepatotoxicity	Strictly calculate the total dose, limit in patients with liver diseases

Summarized from regulatory warnings and interaction summaries. [25]

Special groups: where additional precautions are required

Pregnancy. Nonsteroidal anti-inflammatory drugs are contraindicated in the second half of pregnancy due to the risk of oligohydramnios and fetal renal damage; paracetamol remains the drug of choice for short-term use for pain and fever after consultation with a physician. [26]

Chronic kidney disease. Current guidelines recommend avoiding systemic nonsteroidal anti-inflammatory drugs or using them very cautiously and briefly, with monitoring of renal function, as they may worsen progression and cause acute injury. [27]

Cardiovascular disease. Any systemic nonsteroidal anti-inflammatory drug increases the relative risk of cardiovascular events, so the choice is made in favor of the minimum doses for the shortest period after assessing the risk profile. [28]

Liver disease and alcohol consumption. Paracetamol is limited to a daily dose, carefully considering all sources, and in cases of severe liver dysfunction, an individual pain management plan is selected. [29]

Table 6. Special groups and practical guidelines

Situation	What to consider	Practical solution
Pregnancy	Risks of nonsteroidal anti-inflammatory drugs from week 20	Paracetamol is preferred, briefly based on indications
Chronic kidney disease	Risk of deterioration of kidney function	Avoid nonsteroidal anti-inflammatory drugs or use them for short periods with monitoring
Cardiovascular diseases	Increased risk of heart attack and stroke	Minimal doses, short courses, evaluation of alternatives
Liver diseases	Risk of paracetamol hepatotoxicity	Limit daily intake, consider all sources

According to current clinical guidelines and regulatory warnings. [30]

How to take pills correctly

Start with the lowest effective dose and assess the effect at frequent intervals, reducing the frequency as improvement occurs. Avoid concomitant use of two nonsteroidal anti-inflammatory drugs and carefully calculate the total paracetamol dose from all medications. If you have risk factors for gastrointestinal bleeding, protect your stomach with a proton pump inhibitor and avoid combining with alcohol. [31]

If NSAIDs must be used alongside low-dose aspirin, maintain time intervals to avoid compromising aspirin's cardioprotective effects. When prescribing therapy to patients with chronic conditions, monitor the safety profile and avoid high-risk combinations, including a "triple whammy" for kidney damage. [32]

Brief selection algorithm

1. Eliminate "red flags." 2) Maximize non-pharmacological measures and topical forms. 3) For systemic therapy, start with a short course of non-steroidal anti-inflammatory drugs if there is an inflammatory component, or paracetamol if contraindicated. 4) For chronic, persistent pain, consider duloxetine or tricyclic antidepressants as adjuvants. 5) Always assess risks and interactions, including cardiovascular and renal profile. [33]