Pharma (tema 4) Flashcards

1
Q

Espectinomicina relacionada estructuralmente con…

A

Aminoglucosidos

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2
Q

Espectinomicina tx alternativo para…

A

Gonorrea

En caso de alergia o resistencia

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3
Q

Sulfonamides es análogo estructural de..

A

acido p-aminobenzoico (PABA)

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4
Q

Sulfonamidas (mecanismo de acción)

A
  • Inhiben competitivamente a la dihidropteroato sintasa
  • Bloquean de manera reversible a la síntesis de acido folico
  • Produce purinas y síntesis de acidos nucleicos
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5
Q

Las sulfas son bactericidas o bacteriostáticos

A

Bacteriostaticas

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6
Q

Sulfas sin actividad para…

A

Ricketssias

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7
Q

Sulfas tienen utilidad en…

A

Bacterias grampositivas y gramnegativas
Nocardia
Clamidia trachomatis

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8
Q

Sulfas (mecanismos de resistencia)

A
  • Por sobreproduccion de PAB
  • Por menor afinidad de la enzima por sulfonamida
  • Perdida de la permeabilidad celular a las sulfas
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9
Q

Sulfa, que tipo de grupos hay..

A
  1. oral absorbible
  2. oral no absorible
  3. topica
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10
Q

Sulfas orales absorbibles usos clinicos…

A

Infecciones urinarias

Infecciones respiratorias altas

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11
Q

Sulfas reacciones adversas..

A
  • Fiebre, exantema, urticaria
  • Dermatitis exfoliativa
  • Fotosensibilidad
  • Sindrome de Stevens Johns
  • Anemia aplasica o hemolitica
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12
Q

Menciona las dos pirimidinas…

A

Trimetoprim y pirimetamina

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13
Q

Trimetoprim inhibe a…

A

Inhibe selectivamente a dihidrofolato reductasa

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14
Q

Pirimetamina inhibe a…

A

Inhibe selectivamente a la dihidrofolato reductasa de los protozoarios

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