Updated: Sep 3, 2009
Chronic paroxysmal hemicrania (CPH) is also known as Sjaastad syndrome. It was first described in 1974 by Sjaastad and Dale.1 In 1976, the term CPH was proposed by Sjaastad on the basis of the first 2 patients, who had daily (ie, chronic), solitary, limited attacks (ie, paroxysmal) of unilateral headache that did not shift sides (ie, hemicrania).2 CPH, which has been included in the International Headache Society (IHS) classification system since 1988, is much less common than cluster headache (CH).
The short-lasting primary headache syndromes may be divided into (1) headaches with autonomic activation and (2) headaches without autonomic activation. Headaches with autonomic activation include chronic and episodic paroxysmal hemicrania, CH, and short-lasting unilateral neuralgiform headache with conjunctival injection and tearing (SUNCT syndrome).
The mechanisms responsible for the pain in CPH remain unknown. Discussion of important features, such as unilateral intense headache, autonomic abnormalities, and effectiveness of indomethacin, may help in understanding the pathogenesis.3
The release of both trigeminal and parasympathetic neuropeptides during headache has been described.4 Activation of the ipsilateral trigeminovascular system may explain sudden unilateral headache and may lead to miosis, increased intraocular pressure (IOP), and other autonomic abnormalities.
Increased sweating and decreased salivation during attacks and inhibition of increased IOP by an alpha-blocking agent or stellate ganglion blockade suggest sympathetic involvement.
Increased tearing, nasal secretion, and miosis may be due to parasympathetic stimulation. Trigeminoparasympathetic activation during CPH attack has been suggested; increases in vasoactive intestinal peptide (ie, parasympathetic peptide) level have been reported. Levels of calcitonin gene-related peptide also are reported to be high during CPH attacks.
Pain and pressure threshold, nociceptive flexion reflex, and blink and corneal reflexes have been studied in patients with CPH. The corneal reflex thresholds have been found to be decreased bilaterally during CPH attacks. Increases in corneal temperature on the symptomatic side also have been reported; this finding may be due to increased ocular blood flow.
The effectiveness of indomethacin in CPH may be due partly to reduction of intracranial blood flow (via a nonprostaglandin mechanism) and partly to its anti-inflammatory effects.
These findings may indicate a primary central mechanism and a secondary involvement of peripheral factors, affecting both the sympathetic and parasympathetic systems.
Recent studies suggest crucial role of hypothalamus. Functional neuroimaging studies have demonstrated activation of hypothalamus in cases of trigeminal autonomic cephalgias.5,6
CPH is a rare syndrome, but the number of diagnosed cases is increasing. The prevalence of CPH is not known, but the relative frequency compared with CH is reported to be approximately 1-3%.
Many cases of CPH have been described throughout the world, in different races and different countries, including Australia, Czech Republic, Slovakia, Denmark, Italy, France, Mexico, Canada, Sweden, Germany, Poland, India, Spain, Brazil, South Africa, Norway, New Zealand, the United Kingdom, and the United States.
Mortality rate and morbidity of CPH have not been reported, although the therapy of choice, indomethacin, is known to be associated with the risk of bleeding.
CPH is not known to occur preferentially in any race. CPH has been described in Caucasians and black South Africans.
In the past, because of female preponderance, CPH was considered a disease of women. However, CPH has been reported in increasing numbers of men. A study conducted in 1979 reported a female-to-male ratio of 7:1, but a review of 84 patients in 1989 reported a female-to-male ratio of 2.3:1.
CPH can occur at any age; mean age of onset is 34 years.7 The youngest patient described in the literature was aged 6 years and the oldest was aged 81 years.8,9 In one report, CPH beginning at age 3 years was described; however, it may have been related to ipsilateral occipital hemorrhagic infarction.10
The pain is unilateral, always affects the same side, and is generally oculofrontotemporal in location. The literature does contain reports of a few unusual cases, for example, patients with bilateral symptoms and possible shift in the side of the headache when the CPH progresses from the nonchronic to the chronic stage.
No definite cause is known.
Cluster Headache
Migraine Headache
Migraine Variants
Trigeminal Neuralgia
Differential diagnosis should include other headaches with major autonomic features (eg, SUNCT syndrome) and persistent headaches with milder autonomic features (eg, hemicrania continua [HC]).
Several paroxysmal indomethacin-responsive headache syndromes have been described, including HC, jabs-and-jolts syndrome, icepick headache, hypnic headache syndrome, benign cough headache syndrome, benign exertional headache, coital headache, and thunderclap headache.Cervicogenic headache, facial neuralgia, and other rare disorders, such as the red ear syndrome, also are considered in the differential diagnosis.Simultaneous occurrences of CPH and other disorders, including CH, trigeminal neuralgia (CPH-tic syndrome), and migraine, also have been reported. The crucial factor in the differential diagnosis is the absolute response to indomethacin.The trigeminal-autonomic cephalgias include CH and paroxysmal hemicranias in which head pain and cranial autonomic symptoms are prominent. CH is the most important differential diagnosis.CH has male preponderance, unlike CPH, which is more common in females. In CPH, frequency of attacks is higher, usually more than 15 in 24 hours, whereas CH has an attack frequency of 1-4 (maximum 8) in 24 hours. The duration of headaches is shorter in CPH (2-25 min) than in CH (15-60 min).Ophthalmologist - To evaluate ocular pathology such as glaucoma or orbital pseudotumor
Drug of choice in the treatment of CPH is indomethacin. When a patient experiences frequent unilateral headaches (ie, >4 attacks in 24 h), a drug trial with indomethacin should be considered. The dose of indomethacin should be increased to at least 150 mg/d for 3-4 d. Beneficial effect is seen usually within 48 h, but may take as long as 5 d. In one study, indomethacin effect was complete within 24 h in most patients, and frequently the effect was seen within 8 h. Maintenance dosage is usually 25-100 mg/d but may range from 12.5-300 mg/d. After discontinuation of medication, symptoms usually reappear within 12 h to a few days. However, long remission periods lasting years have been described.
About 10% of patients may experience adverse effects of indomethacin, including dyspepsia, nausea, vomiting, vertigo, gastric bleeding, purpura, and other conditions. To prevent gastric adverse effects, antacids, misoprostol, or an H2 antagonist or proton pump inhibitor may be coadministered when indomethacin is being used for longer periods. An indomethacin suppository is another option for gastric intolerance or when a higher dose (eg, 300 mg/d) is needed.
A recent article suggests that topiramate could be helpful as a preventive agent.
These agents have analgesic, anti-inflammatory, and antipyretic activities. Their mechanism of action is not known, but they may inhibit cyclooxygenase activity and prostaglandin synthesis. Other mechanisms may exist as well, such as inhibition of leukotriene synthesis, lysosomal enzyme release, lipoxygenase activity, neutrophil aggregation, and various cell-membrane functions.
Has absolute effect on symptoms of CPH. Available as immediate-release preparation, sustained-release preparation, suppository, and oral suspension. Ninety capsules of branded immediate-release indomethacin costs $61.38 and generic costs $25.93. Thirty capsules of sustained-release indomethacin costs $64.57 and generic costs $42.46. Recently, in one pharmacy review, cost for 30 days treatment with generic indomethacin 50 mg bid was estimated to be $5.58.
Immediate release: 25-50 mg PO tid
Sustained release: 75 mg PO qd/bid
Suppository: 50 mg PR
<14 years: Not recommended except for neonates with patent ductus arteriosus
>14 years: Administer as in adults
Concomitant use with other NSAIDs not advisable because of increased possibility of GI toxicity; diflunisal associated with serious GI hemorrhage; may reduce renal function, use caution when using medications that are excreted by kidneys; may decrease tubular secretion of methotrexate and potentiate its toxicity; like other NSAIDs, may blunt natriuretic effect of furosemide by inhibiting prostaglandin synthesis; can reduce diuretic, natriuretic, and antihypertensive effects of various other diuretic medications; probenecid may increase plasma levels; may increase serum concentration and prolong half-life of digoxin
Documented hypersensitivity; syndrome of nasal polyps; angioedema or bronchospastic reaction to aspirin and other NSAIDs; pulmonary hemorrhage; active GI bleeding, or history of recurrent GI lesions; simultaneous use of lithium (may result in lithium toxicity)
C - Fetal risk revealed in studies in animals but not established or not studies in humans; may use if benefits outweigh risk to fetus
D - Fetal risk shown in humans; use only if benefits outweigh risk to fetus
Caution in patients with renal insufficiency (ie, serum creatinine > 2 mg/dL), hepatic dysfunction, bleeding disorders (ie, platelets <75,000/mm3), parkinsonism, depression, epilepsy, psychiatric disturbances (may cause worsening of symptoms); can mask usual signs and symptoms of infection; fluid retention and peripheral edema have been reported in a few patients
For relief of mild to moderately severe pain; inhibits inflammatory reactions and pain by decreasing activity of cyclooxygenase, which results in decrease of prostaglandin synthesis.
275 mg PO tid or 550 mg bid (proper dose guidelines for CPH not established)
<12 years: Not recommended
>12 years: Administer as in adults
Probenecid may increase toxicity; may decrease effects of loop diuretics; may increase serum lithium levels; anticoagulants may prolong PT
Documented hypersensitivity; peptic ulcer disease; renal or hepatic impairment; concomitant or recent use of anticoagulants; hemorrhagic conditions
B - Fetal risk not confirmed in studies in humans but has been shown in some studies in animals
D - Fetal risk shown in humans; use only if benefits outweigh risk to fetus
Long-term use enhances potential for adverse effects, particularly gastropathy or nephropathy
DOC for patients with mild to moderately severe pain. Inhibits inflammatory reactions and pain by decreasing prostaglandin synthesis.
400-800 mg PO q8h, not to exceed 3200 mg/d (proper dose guidelines for CPH not established)
<12 years: Not recommended
>12 years: Administer as in adults
Probenecid may increase toxicity; may decrease effects of loop diuretics; may increase serum lithium levels; anticoagulants may prolong PT
Documented hypersensitivity; peptic ulcer disease; renal or hepatic impairment; concomitant or recent use of anticoagulants; hemorrhagic conditions
B - Fetal risk not confirmed in studies in humans but has been shown in some studies in animals
D - Fetal risk shown in humans; use only if benefits outweigh risk to fetus
Long-term use enhances potential for adverse effects, particularly gastropathy or nephropathy
Treats mild to moderately severe pain. Inhibits prostaglandin synthesis, which prevents formation of platelet-aggregating thromboxane A2.
Initial dose: 900-1000 mg PO; may be repeated after 2 h if necessary (proper dose guidelines for CPH not established)
<12 years: Not recommended
>12 years: Administer as in adults
Probenecid may increase toxicity; may decrease effects of loop diuretics; may increase serum lithium levels; anticoagulants may prolong PT
Documented hypersensitivity; peptic ulcer disease; renal or hepatic impairment; concomitant or recent use of anticoagulants; hemorrhagic conditions
C - Fetal risk revealed in studies in animals but not established or not studied in humans; may use if benefits outweigh risk to fetus
D - Fetal risk shown in humans; use only if benefits outweigh risk to fetus
Long-term use enhances potential for adverse effects, particularly gastropathy or nephropathy
These agents inhibit calcium ions from entering slow channels, select voltage-sensitive areas, or vascular smooth muscle. Verapamil may be an effective calcium channel blocker for prophylaxis of CPH.
During depolarization, inhibits calcium ion from entering slow channels or voltage-sensitive areas of vascular smooth muscle.
Sustained release: 120 mg/d PO qd; not to exceed 480 mg/d
Immediate release: 40 mg PO tid; not to exceed 480 mg/d
Not established
Carbamazepine, phenobarbital, hydantoins, vitamin D, sulfinpyrazone, and rifampin may decrease serum concentrations by increasing hepatic metabolism; amiodarone may increase toxicity; beta-blockers may increase cardiac depressant effect; cimetidine may increase serum levels; may increase serum levels of cyclosporine, theophylline, carbamazepine, and digoxin
Documented hypersensitivity; sinus bradycardia; cardiogenic shock; second- and third-degree heart block; sick-sinus syndrome; ventricular tachycardia; congestive heart failure; atrial fibrillation or flutter associated with accessory conduction pathways
C - Fetal risk revealed in studies in animals but not established or not studied in humans; may use if benefits outweigh risk to fetus
Use caution in severe left ventricular dysfunction, hepatic or renal impairment, or hypertrophic cardiomyopathy; patients may report headache (which improves after weeks of treatment), hypotension, and dizziness
These agents may be effective in treatment of CPH. Pain relief may occur via inhibition of prostaglandin synthesis.
May decrease inflammation by reversing increased capillary permeability and suppressing PMN activity. High dose prescribed for first few days, followed by gradual taper.
40-60 mg/d PO in divided doses for 5 d, followed by slow taper over 2 wk (proper dose guidelines for CPH not established); long-term use not recommended
Not established
May increase digitalis toxicity secondary to hypokalemia; monitor for hypokalemia when coadministered with diuretics; phenobarbital, phenytoin, or rifampin may increase metabolism of corticosteroids, which decreases their effects; estrogens may decrease clearance; may decrease effects of salicylates
Documented hypersensitivity; viral infection; peptic ulcer disease; hepatic dysfunction; connective tissue infections, fungal or tubercular skin infections; systemic fungal infections or serious infections except septic shock or tuberculous meningitis
C - Fetal risk revealed in studies in animals but not established or not studied in humans; may use if benefits outweigh risk to fetus
Long-term use may predispose patients to hyperglycemia, manifestations of latent diabetes mellitus, nonketotic hyperosmolar state, osteoporosis, avascular necrosis of hip, cataracts, steroid myopathy, cushingoid appearance, weight gain, suppression of pituitary-hypothalamic axis, peptic ulcer disease, suppression of growth (children), unmasking of latent infections (eg, tuberculosis, herpes zoster), increased predisposition to fungal and parasitic infections
Suppression of pituitary-hypothalamic axis may cause patients to require higher doses at times of stress
Water retention resulting from therapy may precipitate congestive heart failure; hypertension and hypokalemia may occur
Agents with state-dependent sodium channel–blocking action and inhibitory activity of neurotransmitter GABA may have prophylactic effects on CPH.
Sulfamate-substituted monosaccharide with broad spectrum of antiepileptic activity that may have state-dependent sodium channel–blocking action, potentiates inhibitory activity of neurotransmitter GABA. In addition, may block glutamate activity. Not necessary to monitor plasma concentrations to optimize therapy.
25 mg PO hs; increase to 50 mg PO hs at 1 wk interval and increase further as necessary; patients with migraine will respond to 50 mg to 100 mg hs
Not established
Phenytoin, carbamazepine and valproic acid can significantly decrease topiramate levels; topiramate reduces digoxin and norethindrone levels, when administered concomitantly; concomitant use with carbonic anhydrase inhibitors may increase risk of renal stone formation and should be avoided; use topiramate with extreme caution when administering concurrently with CNS depressants since may have an additive effect in CNS depression, as well as other cognitive or neuropsychiatric adverse events
Documented hypersensitivity
C - Fetal risk revealed in studies in animals but not established or not studied in humans; may use if benefits outweigh risk to fetus
Risk of developing a kidney stone formation is increased 2-4 times that of untreated population; risk may be reduced by increasing fluid intake; caution in renal or hepatic impairment; patients taking topiramate should seek immediate medical attention if they experience blurred vision or periorbital pain; continued usage after symptoms develop, can lead to glaucoma; primary treatment is discontinuation of topiramate; if left untreated, serious sequelae, including permanent vision loss, may occur; oligohidrosis and hyperthermia has been reported predominantly in children during vigorous exercise or exposure to warm environmental temperatures (ensure proper hydration prior and during activity and warm temperatures); may cause hyperchloremic, non-anion gap metabolic acidosis acute or chronic metabolic acidosis resulting in hyperventilation, and nonspecific symptoms, such as fatigue and anorexia, or more severe adverse effects including cardiac arrhythmias or stupor; chronic, untreated metabolic acidosis may increase nephrolithiasis or nephrocalcinosis risk, osteomalacia (ie, rickets in pediatric patients), or osteoporosis with an increased risk for bone fractures; chronic metabolic acidosis in pediatric patients may also reduce growth rates; measure baseline and periodic serum bicarbonate; sprinkle capsules should be swallowed whole or carefully open capsule and sprinkle contents on soft food immediately before ingestion, do not chew or crush
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Sjaastad syndrome, IHS code: 3.2 chronic paroxysmal hemicrania, ICD-9 code: 346.9 hemicrania, CPH, headache, indomethacin, chronic paroxysmal hemicrania, unilateral headache, headaches with autonomic activation, headaches without autonomic activation, chronic and episodic paroxysmal hemicrania, short-lasting unilateral neuralgiform headache with conjunctival injection and tearing, SUNCT syndrome
Manish K Singh, MD, Assistant Professor, Department of Neurology, Teaching Faculty for Pain Management and Neurology Residency Program, Hahnemann University Hospital, Drexel College of Medicine; Medical Director, Neurology and Pain Management, Jersey Institute of Neuroscience
Manish K Singh, MD is a member of the following medical societies: American Academy of Neurology, American Academy of Pain Medicine, American Association of Physicians of Indian Origin, American Headache Society, American Medical Association, and American Society of Regional Anesthesia and Pain Medicine
Disclosure: Nothing to disclose.
Jashvant Patel, MD, Medical Director, Department of Pain Medicine and Comprehensive Rehabilitation, Medical College of Pennsylvania Hahnemann University
Jashvant Patel, MD is a member of the following medical societies: Alberta Medical Association, American Academy of Pain Medicine, American Academy of Physical Medicine and Rehabilitation, American Medical Association, American Society of Regional Anesthesia and Pain Medicine, and Medical Society of the State of New York
Disclosure: Nothing to disclose.
Jorge E Mendizabal, MD, Consulting Staff, Corpus Christi Neurology
Jorge E Mendizabal, MD is a member of the following medical societies: American Academy of Neurology, American Headache Society, National Stroke Association, and Stroke Council of the American Heart Association
Disclosure: Nothing to disclose.
Francisco Talavera, PharmD, PhD, Senior Pharmacy Editor, eMedicine
Disclosure: eMedicine Salary Employment
James H Halsey, MD, Professor, Department of Neurology, University of Alabama Medical Center
James H Halsey, MD is a member of the following medical societies: American Academy of Neurology, American Heart Association, American Medical Association, American Neurological Association, American Society of Neuroimaging, Medical Association of the State of Alabama, New York Academy of Sciences, Pan American Medical Association, Sigma Xi, Society for Neuroscience, and Southern Medical Association
Disclosure: Nothing to disclose.
Selim R Benbadis, MD, Professor, Director of Comprehensive Epilepsy Program, Departments of Neurology and Neurosurgery, University of South Florida School of Medicine, Tampa General Hospital
Selim R Benbadis, MD is a member of the following medical societies: American Academy of Neurology, American Academy of Sleep Medicine, American Clinical Neurophysiology Society, American Epilepsy Society, and American Medical Association
Disclosure: Nothing to disclose.
Howard A Crystal, MD, Professor, Departments of Neurology and Pathology, State University of New York Downstate; Consulting Staff, Department of Neurology, University Hospital and Kings County Hospital Center
Howard A Crystal, MD is a member of the following medical societies: American Academy of Neurology and American Neurological Association
Disclosure: Medivations Honoraria Consulting
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