sign in sign up
<<
Home , Benzobarbital, Brivaracetam, Ethotoin, Mesuximide, Phensuximide, Sultiame

Antiepileptics/ 471

(negative ). The term ‘myoclonus’ is non-spe- . There is limited evidence that the benzodi- Benzobarbital (rINN) cific and classification is important in order to decide on azepines, sodium , and probably are Benzobarbitalum; Benzobarbitone; Benzonal; Benzonalum. 1- 1-4 treatment: porphyrinogenic but has been treated Benzoyl-5-ethyl-5-phenylbarbituric acid. • physiological (in normal subjects) successfully with intravenous . prophy- Бензобарбитал laxis may be undertaken as a calculated risk using val- • essential (no known cause) C19H16N2O4 = 336.3. • epileptic ( dominate) proate or if considered essential. Magnesium CAS — 744-80-9. sulfate is safe. is also probably safe. • symptomatic (encephalopathy dominates—causes in- and have each been tried in a few clude storage diseases, neurodegenerative syndromes, patients without ill-effect, although there has been a report H toxic and drug-induced syndromes, and hypoxia) of a bullous skin eruption in a patient with porphyria cuta- O N O In epileptic myoclonus, epileptic seizures (myoclonic sei- nea tarda given vigabatrin.3 Of the other newer antiepilep- zures in which the motor manifestation is myoclonus) tics, was used successfully in one patient O N dominate. Their treatment is discussed under , whilst was associated with an acute porphyric CH above. Essential myoclonus may benefit from clon- 3 attack in another; and have been O azepam. Botulinum toxin has been used successfully for found to increase hepatic and urinary porphobilinogen spasmodic movements in some forms of myoclonus. concentrations.2 Other antiepileptics such as the succinim- Myoclonus may also be subdivided into cortical, reticular, ides (, , ) and oxa- or spinal forms. Cortical myoclonus is considered to be a zolidinediones () are considered to be subset of epilepsy and responds best to antiepileptics, usu- unsafe. NOTE. The name benzonal has also been used as a proprietary ally valproate and/or clonazepam; or levetira- 1. Gorchein A. Drug treatment in acute porphyria. Br J Clin Phar- name for benzonatate (p.1552). macol 1997; 44: 427–34. cetam are also used, usually as adjunctive therapy. Reticu- Pharmacopoeias. In Int. lar myoclonus is usually caused by anoxia or acute 2. Solinas C, Vajda FJ. Epilepsy and porphyria: new perspectives. J Clin Neurosci 2004; 11: 356–61. encephalopathy and may be treated with clonazepam; se- Profile 3. Hommel L, et al. Acute bullous skin eruption after treatment Benzobarbital is a used in the treatment of epilepsy. rotonin or serotonergic agonists have also been tried. Post- with vigabatrine. Dermatology 1995; 191: 181. hypoxic myoclonus occurring after hypoxic coma may re- spond to oxitriptan or serotonin combined with carbidopa; antiepileptics may help. 4-Amino-3-hydroxybutyric Acid (USAN, rINN) 1. Caviness JN. Myoclonus. Mayo Clin Proc. 1996; 71: 679–88. Ácido 4-amino-3-hidroxibutírico; γ-Amino-β-hydroxybutyric ac- Brivaracétam; Brivaracetamum; UCB-34714. (2S)-2-[(4R)-2- 2. Blindauer K. Myoclonus and its disorders. Neurol Clin North Am Oxo-4-propylpyrrolidin-1-yl]butanamide. 2001; 19: 723–34. id; Buxamin; Gabob; Gamma-amino-beta-hydroxybutyric acid. 3. Agarwal P, Frucht SJ. Myoclonus. Curr Opin Neurol 2003; 16: 4-Амино-3-оксимасляная Кислота Бриварацетам 515–21. C4H9NO3 = 119.1. C11H20N2O2 = 212.3. 4. Caviness JN, Brown P. Myoclonus: current concepts and recent CAS — 352-21-6. CAS — 357336-20-0. advances. Lancet Neurol 2004; 3: 598–607. Neonatal seizures. Neonatal seizures differ from epi- H lepsy, and the definitions in the 1989 international classifi- H2N cation of epilepsy and epileptic syndromes (see above) OH H3C O may be of little value; (a study1 has suggested that the pro- posed 2001 classification may be more helpful). They are N frequently subtle and difficult to recognise.2 Causes in- O NH2 clude asphyxia, glucose or electrolyte imbalance, infec- HO O H CH3 tion, CNS or cerebrovascular lesions, inborn errors of me- 3-5 tabolism, and drug withdrawal or intoxication. Profile Profile Neonatal seizures represent a neurological emergency in Aminohydroxybutyric acid has been claimed to be of value in a Brivaracetam is under investigation for the treatment of various the newborn and rapid diagnosis and treatment is essen- variety of neurological disorders including use as an adjunct in types of epilepsy including progressive myoclonic epilepsy and tial.3-7 Infusion of glucose or electrolytes may be of bene- the treatment of epilepsy. It has also been promoted as a dietary refractory partial seizures. fit.4,5 Current practice involves giving antiepileptic drugs supplement for its supposed beneficial effects on the CNS and ◊ References. to control seizures, although there is no consensus on, nor growth hormone. It should be distinguished from its isomer 3- 1. Sargentini-Maier ML, et al. The , CNS phar- good evidence for, their use.2,7 and pheny- amino-4-hydroxybutyric acid (GOBAB), which is reported to macodynamics and adverse event profile of brivaracetam after 3-6 possess anti-inflammatory and antifungal activity. single increasing oral doses in healthy males. Br J Clin Pharma- toin are the most widely used. Traditionally, phenobar- col 2007; 63: 680–8. bital has been considered to be the mainstay of treatment Preparations 2. Rolan P, et al. The pharmacokinetics, CNS pharmacodynamics for all types of seizures in neonates; however response Proprietary Preparations (details are given in Part 3) and adverse event profile of brivaracetam after multiple increas- rates are variable.6-8 If seizures persist, may be Arg.: Gabimex; Braz.: Gamibetal†; Ital.: Gamibetal; Mex.: Gamibetal; ing oral doses in healthy men. Br J Clin Pharmacol 2008; 66: 8 Port.: Gabomade; Gamibetal†. 71–5. added to therapy. Other drugs that have been tried include 3. Malawska B, Kulig K. Brivaracetam: a new drug in development 9 3-5,8,10,11 Multi-ingredient: Arg.: Gabimex Plus; Braz.: Gamibetal Complex†; carbamazepine, , , Ital.: Gamibetal Complex; Gamibetal Plus; Parvisedil; Mex.: Gamibetal for epilepsy and neuropathic pain. Expert Opin Invest Drugs ,3,8,10 and .4,5 Pyridoxine-dependent Complex; Port.: Gabisedil†; Gamibetal Compositum†; Spain: Cefabol; 2008; 17: 361–9. seizures can be abolished by regular large doses of the Dorken; Gamalate B6; Redutona. vitamin4,5 (see p.1979). 1. Mastrangelo M, et al. Epileptic seizures, epilepsy and epileptic syndromes in newborns: a nosological approach to 94 new cases (rINN) Carbamazepine (BAN, USAN, rINN) by the 2001 proposed diagnostic scheme for people with epilep- tic seizures and with epilepsy. Seizure 2005; 14: 304–11. Barbeksaklon; Barbexaclona; Barbexaclonum. Compound of (−)- Carbamazepina; Carbamazépine; Carbamazepinum; G-32883; 2. Rennie J, Boylan G. Treatment of neonatal seizures. Arch Dis N,α-Dimethylcyclohexaneethylamine with 5-ethyl-5-phenylbar- Karbamatsepiini; Karbamazepin; Karbamazepinas; Karbamazepi- Child Fetal Neonatal Ed 2007; 92: F148–F150. bituric acid . num. 5H-Dibenz[b,f]azepine-5-carboxamide. 3. Evans D, Levene M. Neonatal seizures. Arch Dis Child Fetal Neonatal Ed 1998; 78: F70–F75. Барбексаклон Карбамазепин 4. Hill A. Neonatal seizures. Pediatr Rev 2000; 21: 117–21. C12H12N2O3,C10H21N = 387.5. C15H12N2O = 236.3. 5. Painter MJ, Alvin J. Neonatal seizures. Curr Treat Options Neu- CAS — 4388-82-3. CAS — 298-46-4. rol 2001; 3: 237–48. ATC — N03AA04. 6. Painter MJ, et al. Phenobarbital compared with phenytoin for ATC Vet — QN03AA04. ATC — N03AF01. the treatment of neonatal seizures. N Engl J Med 1999; 341: ATC Vet — QN03AF01. 485–9. 7. Booth D, Evans DJ. for neonates with seizures. Available in The Cochrane Database of Systematic Reviews; Is- H sue 3. Chichester: John Wiley; 2004 (accessed 09/06/08). OON 8. Boylan GB, et al. Second-line treatment of neo- natal seizures: a video-EEG monitoring study. Neurology 2004; 62: 486–8. CH3 HN CH 9. Shoemaker MT, Rotenberg JS. Levetiracetam for the treatment 3 N of neonatal seizures. J Child Neurol 2007; 22: 95–8. NH 10. Shany E, et al. Comparison of continuous drip of or lidocaine in the treatment of intractable neonatal seizures. J O O NH2 Child Neurol 2007; 22: 255–9. CH3 11. Castro Conde JR, et al. Midazolam in neonatal seizures with no response to phenobarbital. Neurology 2005; 64: 876–9. Pharmacopoeias. In Chin., Eur. (see p.vii), Int., Jpn, and US. Profile Ph. Eur. 6.2 (Carbamazepine). A white or almost white crystal- Porphyria. Convulsions may occur at the peak of an at- Barbexaclone is a compound of levopropylhexedrine (see under line powder. It exhibits polymorphism. Very slightly soluble in tack of acute porphyria (p.1448) but usually disappear as Propylhexedrine, p.2163) with phenobarbital (p.492). It is used water; sparingly soluble in and in ; freely soluble the attack resolves and therapy should be aimed at the un- in the treatment of various types of epilepsy (p.465). Usual adult in . Store in airtight containers. derlying disease. However, some patients continue to have doses are 200 to 400 mg daily given by mouth in divided doses. USP 31 (Carbamazepine). A white or off-white powder. Practi- convulsions while in remission and their management pos- Preparations cally insoluble in water; soluble in alcohol and in acetone. Store es a major therapeutic problem as all the first-line antiepi- in airtight containers. 1,2 Proprietary Preparations (details are given in Part 3) leptics have been associated with acute attacks. Barbitu- Austria: Maliasin; Braz.: Maliasin; Gr.: Maliasin; Ital.: Maliasin; Switz.: Ma- Incompatibility. Carbamazepine suspension should be mixed rates (phenobarbital, primidone), (phenytoin, liasin; Turk.: Maliasin. with an equal volume of diluent before nasogastric use as undi- ), and carbamazepine are considered unsafe, as is luted suspension is adsorbed onto PVC nasogastric tubes.1 The symbol † denotes a preparation no longer actively marketed The symbol ⊗ denotes a substance whose use may be restricted in certain sports (see p.vii)