Phenytoin Requires That a Trough Level Be Drawn

question 4

Multiple Choice

Phenytoin requires that a trough level be drawn. Peak and trough levels are done:

• A) When the drug has a wide therapeutic range
• B) When the drug will be administered for a short time only
• C) When there is a high correlation between the dose and saturation of receptor sites
• D) To determine if a drug is in the therapeutic range

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Definitions:

Spermatogenesis

Formation and development of the spermatozoon.

Cryptorchidism

A condition where one or both of the testes fail to descend from the abdomen into the scrotum in male mammals, potentially leading to fertility issues.

Blood-Testis Barrier

A physical barrier formed by Sertoli cells in the seminiferous tubules of the testicles, crucial for protecting developing sperm from harmful substances and immune reactions.

Sustentacular Cells

Supportive cells found in various tissues, such as the male reproductive system, providing nourishment and support to other cells.