anti-epileptics Flashcards
dose of phenytoin
LD: PO 1000mg 2-4 doses in 12-24h
IV: 1000-1500mg
maintain 300-400mg/d
carbamazepine
LD: 100mg BD
MD: 400-1600mg/d in 3-4 doses
oxacarbazepine
LD: 300md BD
LD: 600-2400mg/d in 2 divided does
phenobarbital
LD: 180mg BD 3d
MD: 90-180mg once
lamotrigine
LD: 25mg BD
MD: 250-500mg/d
levetiracetam
LD: 250-500mg BD
MD: 1000-3000mg/d in 2 divided doses
topiramate
LD: 25mg/d
BD: 100-400mg in 2 divided doses
self harm
topiramate, leve, vigabatrin
SJS
carba, phenytoin, phenobarbital, lamotrigine, oxacarbamazapine
decreased folate
carba, phenytoin, gaba
decrease b12
phenobarbital, topiramate, pregabalin
phenytoin ADR
dose related: diplopia, ataxia, gingivial, hirsutism, coarse facial features, osteomalacia, megaloblastic anaemia
idiosyncratic: rash, sjs, fever, hepatic, blood dysfunction
carbamazepine ADR
dose related: diplopia, ataxia, GI, sedation
idiosyncratic: sjs, rash, blood dysfunction, hepatic, SIADH
phenobarbital ADR
dose related: sedation, insomnia, behaviour, diplopia,
idiosyncratic: rash sjs
valproate ADR
dose related: GI, tremor, sedation, weight gain, hair loss, thrombocytopenia
idiosyncratic: hepatic, peripheral edema, pancreatitis