Metotrexato Flashcards

1
Q

Mecanismo de Acción

A

Inhibidor de la enzima dihidrofolatoreductasa, bloquea síntesis de DNA y causa muerte celular

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2
Q

Función de enzima dihidrofolatoreductasa

A

Convierte el ácido fólico en tetrahidrofolato

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3
Q

Vía de administración

A

Oral
Intratecal
Intramuscular

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4
Q

UPP

A

50%

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5
Q

Metabolismo

A

Hepático

Intracelular

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6
Q

Eliminación

A

Renal

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7
Q

Indicaciones Terapéuticas

A
Leucemia linfocítica aguda
Leucemia mieloblástica aguda
Carcinoma de mama
Carcinoma de pulmón 
Linfomas 
Linfosarcomas
Psoriasis refractaria
ARTRITIS REUMATOIDE
Tumores trofoblásticos 
Carcinoma de cabeza y cuello 
Aborto
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8
Q

RAM son inevitables

A
Leucopenia
Trombocitopenia
Anorexia
Náuseas
Vómito
Melena
Diarrea
Artralgias
Edema
Hematuria
Mareo 
Confusión 
Visión borrosa
Somnolencia
Cefalea
Crisis convulsivas
Cansancio exagerado 
Alopecia
Fotosensibilidad
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9
Q

Interacciones

A
Alcohol (aumenta hepatotoxicidad)
Salicilatos
AINES
Inmunizaciones
Aciclovir
Cumarina
Ácido Fólico
Kanamicina
Neomicina
Trimetoprima
Pirimetamina
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10
Q

Contraindicaciones

A
Embarazo
Lactancia
Varicela 
Herpes Zoster
Ascitis 
Obstrucción gastrointestinal 
Derrame peritoneal o pleural
Disfunción renal y hepática
Antecedentes de gota
Infección 
Úlcera péptica
Colitis Ulcerosa
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11
Q

Clasificación FDA

A

X

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