Clinical Pharmacology:Neuropharmacology, CNS Anatomy,
PNS Function, Neuronal Physiology, Synaptic Transmission,
Neurotransmitters, Action Potentials, Spinal Cord Pathways,
Motor-Sensory Integration, Brain Lobes, Cerebellum, Brainstem,
Reticular Activating System, Aphasia Types, Intracranial Pressure,
Cerebral Perfusion, Cerebral Edema, Hydrocephalus, Skull
Fractures, Traumatic Brain Injury, Hematomas, Seizure Disorders,
Antimicrobial Agents, Antibiotic Classes, Antiviral Therapy,
Antifungal Management, Antiprotozoal Therapy, Opioid
Agonists/Antagonists, Migraine Pathophysiology, Triptans, CGRP
Inhibitors Exam Questions Verified and Provided with Complete
A+ Graded Rationales Latest Updated 2026
Anti-infective Agent
Used to treat systemic infections and sometimes for prophylaxis.
What is selective toxicity?
The ability to affect the certain proteins or enzymes only used by the infecting organism, but not human
cells.
Do anti-infective agents have complete selective toxicity?
No.
- Can't completely differentiate between the organism and human cells because of similarities.
- No anti-infective drugs that do not affect the host.
,What is the therapeutic action of anti-infective agents?
Goal is to prevent organism from reproducing, cause cell death without affecting host cells.
Many different mechanisms of action depending on the drug class.
Narrow Spectrum
Effective against few organisms.
Broad Spectrum
Ability of a drug to be effective against a wide range of microorganisms.
Bactericidal
Kills bacteria.
Bacteriostatic
Inhibits bacterial growth.
What is resistance?
Over time, pathogens have the ability to adapt to the anti-infectives and produce cells that are no longer
affected by the drug.
How does resistance occur?
-Produce an enzyme that deactivate the antimicrobial drug.
-Change cell permeability to prevent the drug from entering the cell.
,-Altering binding sites on the membranes which then no longer accept the drug.
-Produce a chemical that acts as an antagonist to the drug.
How can we prevent resistance?
Doses of anti-infective meds should be high enough and duration should be long enough.
Around-the-clock dosing eliminates peaks and valleys to keep concentration at a therapeutic level.
*Duration of drug is important to ensure microbes are completely eliminated and not given the chance
to grow and develop resistant strains*
Antibiotics should only be used to treat _________________, they are not effective in treating viruses.
bacterial infections
Should antibiotics be given to a patient before or after a culture being performed?
After.
Why should a culture be performed?
To determine the specific pathogen so it can be treated with specific antibiotics.
Broad-spectrum antibiotics may be started after the culture is taken but before the results show the
exact organisms.
, Combination therapy may be used:
-Smaller doses of each drug: fewer adverse reactions.
-Some drugs more powerful when given as a combination.
-Many infections are caused by many different organisms, each pathogen may react to different
medications.
-Combined effects of different drugs may delay emergence of resistance strains.
What adverse reactions can occur with anti-infectives?
Kidney Damage
Gastrointestinal Toxicity
Neurotoxicity
Some drugs can interfere with function of nerve.
Hypersensitivity Reactions
What is a superinfection?
Normal flora found in and on the surface of the body and in the GI tract is destroyed by the antibiotic.
This leads to infections caused by organisms that are usually controlled by the normal flora.
What are examples of superinfections?
Candida (yeast)
- Oral thrush
- Vaginal yeast
PNS Function, Neuronal Physiology, Synaptic Transmission,
Neurotransmitters, Action Potentials, Spinal Cord Pathways,
Motor-Sensory Integration, Brain Lobes, Cerebellum, Brainstem,
Reticular Activating System, Aphasia Types, Intracranial Pressure,
Cerebral Perfusion, Cerebral Edema, Hydrocephalus, Skull
Fractures, Traumatic Brain Injury, Hematomas, Seizure Disorders,
Antimicrobial Agents, Antibiotic Classes, Antiviral Therapy,
Antifungal Management, Antiprotozoal Therapy, Opioid
Agonists/Antagonists, Migraine Pathophysiology, Triptans, CGRP
Inhibitors Exam Questions Verified and Provided with Complete
A+ Graded Rationales Latest Updated 2026
Anti-infective Agent
Used to treat systemic infections and sometimes for prophylaxis.
What is selective toxicity?
The ability to affect the certain proteins or enzymes only used by the infecting organism, but not human
cells.
Do anti-infective agents have complete selective toxicity?
No.
- Can't completely differentiate between the organism and human cells because of similarities.
- No anti-infective drugs that do not affect the host.
,What is the therapeutic action of anti-infective agents?
Goal is to prevent organism from reproducing, cause cell death without affecting host cells.
Many different mechanisms of action depending on the drug class.
Narrow Spectrum
Effective against few organisms.
Broad Spectrum
Ability of a drug to be effective against a wide range of microorganisms.
Bactericidal
Kills bacteria.
Bacteriostatic
Inhibits bacterial growth.
What is resistance?
Over time, pathogens have the ability to adapt to the anti-infectives and produce cells that are no longer
affected by the drug.
How does resistance occur?
-Produce an enzyme that deactivate the antimicrobial drug.
-Change cell permeability to prevent the drug from entering the cell.
,-Altering binding sites on the membranes which then no longer accept the drug.
-Produce a chemical that acts as an antagonist to the drug.
How can we prevent resistance?
Doses of anti-infective meds should be high enough and duration should be long enough.
Around-the-clock dosing eliminates peaks and valleys to keep concentration at a therapeutic level.
*Duration of drug is important to ensure microbes are completely eliminated and not given the chance
to grow and develop resistant strains*
Antibiotics should only be used to treat _________________, they are not effective in treating viruses.
bacterial infections
Should antibiotics be given to a patient before or after a culture being performed?
After.
Why should a culture be performed?
To determine the specific pathogen so it can be treated with specific antibiotics.
Broad-spectrum antibiotics may be started after the culture is taken but before the results show the
exact organisms.
, Combination therapy may be used:
-Smaller doses of each drug: fewer adverse reactions.
-Some drugs more powerful when given as a combination.
-Many infections are caused by many different organisms, each pathogen may react to different
medications.
-Combined effects of different drugs may delay emergence of resistance strains.
What adverse reactions can occur with anti-infectives?
Kidney Damage
Gastrointestinal Toxicity
Neurotoxicity
Some drugs can interfere with function of nerve.
Hypersensitivity Reactions
What is a superinfection?
Normal flora found in and on the surface of the body and in the GI tract is destroyed by the antibiotic.
This leads to infections caused by organisms that are usually controlled by the normal flora.
What are examples of superinfections?
Candida (yeast)
- Oral thrush
- Vaginal yeast
