Sciatica describes the radiating pain along the dermatomal distribution of the sciatic nerve. The majority of cases of sciatica are caused by compression of the lumbar nerve root. However, foraminal stenosis, piriformis syndrome, pelvic floor tumours and obstetrical compression can also cause the condition.

Discogenic sciatica accounts for 87% of the etiopathogenesis, while non-discogenic sciatica makes up 13% of it. An enclosed nucleus pulposus within the annulus fibrosus of the disc causes an extrusion or bulge in the disc, causing a compressed nerve root next to it to cause sciatica. Positional pain that is exacerbated by standing or walking and reduced by sitting or lying down is a common symptom of lumbar spinal stenosis, a condition where limited neural foramina compress nerves. A forward-displaced vertebra crushing a nerve root can cause spondylolisthesis, which can cause sciatica. Usually develops as a result of physical stress, trauma, or degeneration of the spine. Nerve root compression caused by extra-spinal tumours and spinal tumours like schwannoma are examples of non-discogenic sciatica. Sciatic nerve compression caused by piriformis muscle spasm occurring beneath the sciatic nerve results in piriformis syndrome. 1

Sciatica is mostly diagnosed through history-taking, which includes assessing the patterns of pain distribution, and physical tests relying mostly on neurological testing. The Straight Leg Raising/Lasègue's test being the most commonly used examination for sciatica. But no physical examination test or history item possesses both high sensitivity and good specificity. In general, if a patient has the typical unilateral radiating leg pain with a positive result on one or more neurological tests that demonstrate nerve root impairment, sciatica appears to be a valid diagnosis. 1, 2

Those with sciatica are frequently prescribed with analgesics and adjuvant painkillers. Typically, level I and II analgesics such as paracetamol and mild opioids are the mainstay of pain management. Antidepressants, corticosteroids, muscle relaxants, and anticonvulsants are among the other medications that are used occasionally. Usually, two weeks of conservative treatment suffices to alleviate pain and impairment in performing regular activities. At least a year later, symptoms may still be present in up to 30% of instances. 3

Background: The prevalence of clinically proven sciatica in the general population is between 2 and 5%, but in working population cohorts, it can rise as high as 43%. According to reports, the lifetime incidence of sciatica ranges from 10% to 40%. The development of sciatica was not influenced by either gender or body mass, according to a cross-sectional study. Sciatica can worsen further by a number of lifestyle variables, including prolonged sitting, inactivity, bad posture, having a high body mass index (BMI of 25 or above), smoking, physical stress, poor health, and excessive task demands at work. However, low back pain has been linked to body mass index. Overall, the clinical course is favourable, and the prognosis is good. After a year or more, despite the positive prognosis, up to 45% of patients still experience pain. 4

Step-by-step instructions for treating sciatica begin with non-surgical approaches at first, such as exercise proceedings towards pharmacological interventions, if the pain is consistent. Surgery may be considered if non-surgical therapy is ineffective and radiological findings match symptoms.

Considering the adverse effects of conventional medicines for sciatica, the use of homoeopathy as an alternate/optional treatment for sciatica has increased recently. Despite specific indications for Sciatica to be treated with homoeopathy, acute pain management and chronic sciatica have claimed to benefit from homoeopathic medicines clinically with less evidence. This study mainly focuses on the efficacy of homoeopathic medicines for pain associated with sciatica since evidence on their use is limited. 5, 6

Designs: Comprehensive review of various randomized control trials, and experimental studies. comprehensive analysis of case reports and observational studies regarding sciatica.

Objectives: This review aims to explore the efficacy of homoeopathic medicines in the treatment of sciatica pain. To validate the benefits of the homoeopathic approaches in the management of sciatica as an alternate treatment considering various adverse effects of conventional treatment- either surgical vs non-surgical.

In RCT recorded data of 8971, records were screened, reports assessed, trials identified to fulfil selection criteria for eligibility, and 43 trials of 3097 patients were included.Eight RCT trials with 847 patients- gabapentin and pregabalin. 3, 5, 7, 8, 9, 10

An observational study of lumbar spondylosis with sciatica syndrome by homoeopathic remedy Rhus tox and Kali carb (n=14). 6

A Case report of individualized homoeopathic medicine with a study duration of 7-8 months 11

Two in-vivo studies of homoeopathic formulations. 12, 13

Randomized controlled trials: Compared to a placebo, sciatica patients treated with pregabalin did not experience pain alleviation or improvement in their disability after up to 52 weeks similar to gabapentin after 8 weeks. One study for gabapentin shows improvement in back and leg pain at 3-4 month, however, it is found clinically irrelevant due to low VAS score assessment. 3

The evidence for sciatica treatment with neurotrophic factors was found to be very uncertain; anti-NGF and pro-GDNF have little to no effect on the intensity of pain. However small evidence shows that a high dose of anti-NGF may reduce LBP intensity. 5

The effect of pain intensity after surgery declines from moderate in the immediate and to very negligible effect over a year. Only in the short term was discectomy more effective than epidural injection. 7

No beneficial effects of NSAIDs, corticosteroids, antidepressants, opioid analgesics or anticonvulsants in the immediate term, where few trials show evidence for corticosteroids and NSAIDs for acute pain alleviation. 8

Significant effect of Individualized homoeopathic medicines (n=60) against placebo in secondary outcome (SF-MPQ total, SF-MPQ sensory subscale, OLBPQ), despite no certainty in primary outcome due to short-follow-up duration. The most frequently prescribed medicines were Gnaphalium (10%), Bryonia and Rhus Tox (8.3% each), and Hypericum and Staphysagria (6.7% each). 8

In another RCTs of constitutional homoeopathic medicines for managing sciatica pain, remedies such as Colocynthis, Rhus tox, Lachesis, Gnaphalium and natrum mur were found effective. with an overall improvement in about 75% of patients with an overall improvement in about 75% of patients. 9

In-Vivo Trials: Homoeopathic formulation RückPain™ exhibits anti-inflammatory and anti-nociceptive properties against spondylitis in Swiss-albino mice model, with a lower ESR value of 1.55mm/h against a disease control group evaluated by vernier caliper, a smaller inflammatory area in the neck region with 1.53cm² against 1.93cm² in the control group, and less pain with more tolerance using the tail-flick technique further formulation was found to be non-toxic to the liver and spleen of mice.

Homoeopathic Hypericum perforatum 30c in a transected adult rat sciatic nerve, greatly increased the number and diameter of myelinated nerve fibers, resulting in an axonal regrowth with a 1 cm gap in the sciatic nerve. Promoting faster and increased functional recovery of regenerated axons while there is no change in sil group axon diameter till 12 weeks. In this investigation, the Sil/Hypericum group also reveals increased mean gastrocnemius muscle weight ratios than the Sil control group, suggesting possible signs of successful reinnervation of end-organs. 12, 13

Observational studies: Rhus tox have symptom similarity with 60% of patients and the remaining 40% with kali-carb. Most patients belonged to the age group 50-60 years after proper screening and enrolment of the patient presenting with sciatica syndrome. Almost all the patients showed improvement ranging from 70-100% with VAS score almost becoming nil after two weeks to one month of treatment. Most of the Rhus tox patients were evaluated with right-sided unilateral sciatica and Kali-carb with left-sided sciatica.

Case reports: The result for the case report of individualized homoeopathic medicines shows improvement in the patient in a seven-month duration of treatment with the NRS score reducing from 08 to 00 and improvement in the revised Oswestry disability index scale. 11

Approximately more than 18 trials report adverse events.

DRUGS 3

Gabapentin (1 trial)- Ataxia, Drowsiness, Dizziness.

In the RCT for individualized homoeopathic medicines with 60 patients conducted in a medical college in West-Bengal, minor adverse effect was reported during the trial. In the treatment group, 2 participants reported acute diarrhoea which was treated acutely with podophyllum and aloe socotrina and a case of common cold and sore throat in the control group, which was treated with hepar sulph and pulsatilla, all of which are unrelated to medications. 8

Hypericum perfoliatum: Using a Wistar rat sciatic nerve model, hypericum perforatum 30c can regenerate peripheral nerves with increase thickness of myelin sheath promoting 1cm gap axonal regrowth, increasing recovery of sciatic nerve function with improve SFI after treatment along with evidence of end-organ innervation.13 Moreover, it is indicated as a leading remedy in neuralgic pain, and neuritis, with tingling, numbness and burning pain. Traumatic neuralgia and neuritis. Lancinating pain in the lower limb. Aching in the sciatic nerve with prolonged sitting. 12, 14

Kali-carb: Evidence shows that Kali carb with definite reliable symptoms shows improvement in patients with sciatica syndrome within one month with VAS score reducing from apprx. 70 to 10 in most cases. 6

Homoeopathic therapeutics through homoeopathic drug proving- Clinically used in backache, sciatica, and spinal irritation. Indicated in most frequently left-sided sciatica with tearing pain in the thigh with radiating pain from hip to knee. 14

Gnaphalium: Gnaphalium is the most frequently prescribed and effective homoeopathic medicine in treating sciatica found in two randomized controlled trials in this review.8, 9 Anterior crural neuralgia, lumbago, neuralgia, numbness, rheumatism, sciatica. Gnaphalium is used mainly in sciatic nerve disorders. Indicated in sciatica with lumbago along with numbness alternating with pain. Dose-Tincture and all potencies. 15, 14

Rhus Tox: In an observational study, rhus tox was found to be effective in treating lumbar spondylosis with sciatica syndrome by reducing the pain within a month with VAS score reducing from 80 to 10 to even 0. A double-blind RCT conducted in Mahesh Bhattacharya Homoeopathic Medical Hospital, west Bengal reveals rhus tox to be the most frequently prescribed medicine. 8, 9

Therapeutics: Indicated in sciatica; at night, cold, damp weather, numbness and formication, after overwork and exposure. Lancinating pain in the thigh, legs, feet and toes, must change position. Affection of nerves and spinal cords. Pain is tearing, shooting, and stitching which aggravates mostly at night. 15

Causticum- Causticum has also been found to be effective in treating sciatica in RCTs for individualized homoeopathic medicine.8 It is also an ingredient for the homoeopathic formulation Rück-Pain™ Against Spondylitis.12 Left-sided sciatica with numbness. Paralysis of a single part. Cannot walk without suffering. Also manifests its action in arthritic and paralytic affections with progressive loss of muscular strength, and local paralysis of extremities. 14

Colocynthis: Colocin is an active glucoside of Citrullus Colocynthis. Clinically used in neuralgia, pain, sciatica, and rheumatism. Has long-lasting action on large nerves, especially sciatica and spinal nerves. 14 Additionally, data from a double-blind RCT using individualized homoeopathic medications supports its significant use for sciatica. 8 Tensive, lancinating pain in the lumbar region and of the hip, left-sided sciatic pain-drawing, tearing, numbness with pain. Pain is often accompanied by stiffness and retarded motion of affected part. 15

Homoeopathic Formulation Rück-Pain™: The homoeopathic formulation was found to have curative potency in terms of relieving inflammation and also acts as anti-nociceptive through in-vivo trials experimented in a transected sciatic nerve model of Swiss albino mice evaluated through reduced ESR value, reduced area of inflammation, increased tolerance to pain in a flick-tail method. Its constituents included are Acetanilidum2X, Arnica montana3X, Causticum3X, Eschscholtzia californica2X, Hypericum perforatum3X, Lachnanthes tinctoria5X, Rhus tox3X, Ruta graveolens3X and Symphytum officinale6X. It has been discovered that this combination has curative properties for sciatica. 12

NSAIDs, epidural steroid injections, and biological agents are the mainstays of conventional sciatica therapy, which aims to reduce pain but is either costly or does not improve the natural course of the disease and no evidence demonstrated their benefits in this review.

After eight weeks of treatment with gabapentin, there is no improvement in pain disability compared to placebo. Patients undergo various undesirable effects after being treated with anticonvulsants. Drugs targeting neurotrophic factors for sciatica resulted to have no effect in the long run. No favourable effects of drugs used in primary care settings. In addition, several series of adverse effects of the drugs in association with their use have been documented. Neurotrophic factor-targeting drugs are associated with moderate to severe adverse effects at larger dosages as compared to commonly prescribed treatments for LBP or sciatica. Given all this, its routine clinical use has limited support. A surgical approach which is recommended if the non-surgical approach fails to relieve the patients is found not to be effective in the long run at or after a year. 3, 5 Evidence does not clearly support the uses of conventional medicines either surgical or non-surgical approaches for the management of sciatica. 5, 7, 10 These findings reflect the inconclusive benefits and increasing long-term adverse effects of traditional pain management of sciatica.

Homoeopathic formulation RückPain™ exhibiting its effective therapy for inflammation and pain management. Found to have curative potential in terms of reducing inflammation and related pain from spondylitis on a mice animal model in comparison with the control group by reducing ESR, area of inflammation and increasing pain tolerance time.

The properties of enhancing peripheral nerve regeneration by hypericum30c are intriguing and merit additional research. Hypericum perforatum demonstrates promoting axonal regeneration over a one cm gap in an adult rat sciatic nerve. Few homoeopathic remedies which cover the characteristic symptoms of sciatica helps in managing sciatica pain effectively such as Rhus tox and Kali carb.

Certain homoeopathic "constitutional" medicines, according to certain homoeopaths, help treat sciatica and frequently succeed where allopathic medicine has failed.

In RCT studies of individualized homoeopathic medicines, patients show significant progress in reducing pain intensity with favourable outcomes, the most frequently prescribed medicines were Gnaphalium, Bryonia alba, Rhus Tox, Hypericum perforatum and Staphysagria. Homoeopathy treated sciatica cases successfully with no further requirement for spinal surgery to relieve the sciatica pain supporting the evidence to prove homoeopathy for managing sciatica.8, 9, 6, 11, 13, 16 This strengthens our conviction that homoeopathic remedies can effectively treat sciatica.

In this review, no evidence has been found to clearly support the uses of conventional treatment either surgical or non-surgical approaches for sciatica with reports of various adverse events. Conventional therapy for sciatica focuses on the reduction of pain, either by using NSAIDs, epidural steroid injections, or by using neurotrophic agents, but their uses either are non-beneficial in the long run or are expensive. This leads to the approach to complementary and alternative medicines (CAM), such as homoeopathic medicines where various studies show that it exhibits anti-inflammatory and anti-nociceptive properties against spondylitis in animal spine systems by homoeopathic formulation Rück-Pain™, promoting axonal regeneration in a transected animal nerve model by hypericum30c, further formulations were found to be non-toxic to the liver and spleen of mice. and various other individualized homoeopathic medicines show improvement in the patient with no adverse events. Hence this review supports the usage of homoeopathic medicines for the management of pain for sciatica. However, RCTs with a high number of participants and a longer duration should be established to achieve statistically significant results.