Pharmacology for Surgical Technologist Complete Study
Guide 2026 | Surgical Drugs, Anesthesia Medications,
Dosages, Safety Protocols, Sterile Field Pharmacology,
Practice Questions & Exam Prep for CST Certification
Success
Question 1: Which of the following medications is commonly used as a preoperative
antibiotic to prevent surgical site infections in clean-contaminated procedures?
A. Metronidazole
B. Cefazolin
C. Vancomycin
D. Clindamycin
CORRECT ANSWER: B. Cefazolin
Rationale: Cefazolin, a first-generation cephalosporin, is the preferred preoperative
prophylactic antibiotic for most clean-contaminated surgical procedures due to its broad
spectrum against common skin flora, favorable pharmacokinetics, and cost-effectiveness. It is
typically administered within 60 minutes before incision to ensure adequate tissue
concentrations during surgery.
Question 2: What is the primary mechanism of action of succinylcholine as a neuromuscular
blocking agent?
A. Competitive antagonism at nicotinic acetylcholine receptors
B. Inhibition of acetylcholinesterase enzyme
C. Depolarization of the motor end plate
D. Blockade of calcium release from the sarcoplasmic reticulum
CORRECT ANSWER: C. Depolarization of the motor end plate
Rationale: Succinylcholine is a depolarizing neuromuscular blocker that binds to nicotinic
acetylcholine receptors at the motor end plate, causing initial fasciculations followed by
sustained depolarization. This prevents repolarization and subsequent muscle contraction,
resulting in flaccid paralysis. Its rapid onset and short duration make it ideal for rapid sequence
intubation.
Question 3: Which irrigation solution is isotonic and preferred for urological procedures to
minimize electrolyte absorption and complications?
A. Sterile water
B. 3% saline
C. Glycine 1.5%
D. Normal saline (0.9% sodium chloride)
CORRECT ANSWER: D. Normal saline (0.9% sodium chloride)
Rationale: Normal saline is isotonic with plasma and does not cause hemolysis or significant
electrolyte shifts when absorbed during urological procedures like TURP. Glycine is used for
monopolar electrosurgery to prevent conductivity but carries risk of hyponatremia if absorbed.
Sterile water is hypotonic and can cause hemolysis; 3% saline is hypertonic and not used for
irrigation.
Question 4: When administering epinephrine with local anesthetic, what is the primary
benefit for the surgical technologist to understand?
,A. Increased risk of cardiac arrhythmias
B. Prolonged duration of anesthetic effect
C. Enhanced systemic absorption
D. Reduced need for sterile technique
CORRECT ANSWER: B. Prolonged duration of anesthetic effect
Rationale: Epinephrine causes vasoconstriction at the injection site, which slows systemic
absorption of the local anesthetic. This prolongs the duration of anesthesia, reduces bleeding at
the surgical site, and decreases the risk of systemic toxicity. Surgical technologists must be
aware of epinephrine concentrations to assist in proper medication preparation.
Question 5: Which reversal agent is specifically used to counteract the effects of
benzodiazepines such as midazolam?
A. Naloxone
B. Flumazenil
C. Neostigmine
D. Protamine sulfate
CORRECT ANSWER: B. Flumazenil
Rationale: Flumazenil is a competitive antagonist at the benzodiazepine binding site on GABA-A
receptors, rapidly reversing sedation, respiratory depression, and amnesia caused by
benzodiazepines. It is essential for surgical technologists to recognize its use in post-anesthesia
care when patients exhibit prolonged sedation.
Question 6: What is the most critical consideration when preparing heparin for intraoperative
use during vascular procedures?
A. Protecting from light exposure
B. Using a dedicated syringe to avoid contamination
C. Calculating dose based on patient weight and activated clotting time
D. Warming to body temperature before administration
CORRECT ANSWER: C. Calculating dose based on patient weight and activated clotting time
Rationale: Heparin dosing during vascular surgery is weight-based and titrated to achieve a
target activated clotting time (ACT), typically 250-300 seconds for cardiopulmonary bypass.
Accurate calculation and preparation are vital to prevent thrombosis or hemorrhage. Surgical
technologists assist in verifying doses and maintaining sterile technique during preparation.
Question 7: Which medication is classified as a non-depolarizing neuromuscular blocker and
requires reversal with neostigmine and glycopyrrolate?
A. Succinylcholine
B. Rocuronium
C. Propofol
D. Ketamine
CORRECT ANSWER: B. Rocuronium
Rationale: Rocuronium is a non-depolarizing neuromuscular blocker that competitively inhibits
acetylcholine at nicotinic receptors. Its effects are reversed by acetylcholinesterase inhibitors
like neostigmine, which increase acetylcholine levels, combined with glycopyrrolate to
,counteract muscarinic side effects. Surgical technologists must track administration times to
anticipate reversal needs.
Question 8: What is the primary purpose of administering dexamethasone intraoperatively?
A. To induce muscle relaxation
B. To reduce postoperative nausea and vomiting
C. To increase blood pressure
D. To enhance coagulation
CORRECT ANSWER: B. To reduce postoperative nausea and vomiting
Rationale: Dexamethasone, a corticosteroid, is commonly given prophylactically to reduce the
incidence and severity of postoperative nausea and vomiting (PONV). It also has anti-
inflammatory effects that may reduce edema. Surgical technologists should be familiar with its
indications to assist in timely preparation and administration.
Question 9: Which local anesthetic has the longest duration of action and is often used for
postoperative pain control via nerve blocks?
A. Lidocaine
B. Mepivacaine
C. Bupivacaine
D. Chloroprocaine
CORRECT ANSWER: C. Bupivacaine
Rationale: Bupivacaine is a long-acting amide local anesthetic with a duration of 4-8 hours,
making it ideal for peripheral nerve blocks and epidural analgesia. Its high lipid solubility allows
prolonged binding to sodium channels. Surgical technologists must recognize its cardiotoxicity
risk and ensure proper dosing and monitoring.
Question 10: What is the correct action for a surgical technologist if a medication vial appears
cloudy or contains particulate matter?
A. Shake vigorously to redistribute contents
B. Filter through a 0.22-micron filter before use
C. Discard the vial and obtain a new one
D. Warm the vial to dissolve precipitate
CORRECT ANSWER: C. Discard the vial and obtain a new one
Rationale: Cloudiness or particulate matter in a medication vial may indicate contamination,
degradation, or improper storage. Administering such medications poses risks of embolism,
infection, or adverse reactions. Surgical technologists must adhere to strict visual inspection
protocols and discard compromised products immediately.
Question 11: Which medication is used to reverse the anticoagulant effects of warfarin in
emergency surgical situations?
A. Vitamin K
B. Protamine sulfate
C. Idarucizumab
D. Andexanet alfa
CORRECT ANSWER: A. Vitamin K
, Rationale: Vitamin K is the antidote for warfarin toxicity, promoting synthesis of functional
clotting factors II, VII, IX, and X. In emergencies, fresh frozen plasma or prothrombin complex
concentrate may be given for immediate reversal, while vitamin K provides sustained
correction. Surgical technologists should anticipate preparation of reversal agents based on
patient history.
Question 12: What is the primary reason for using tranexamic acid during orthopedic or
cardiac surgery?
A. To prevent infection
B. To reduce blood loss by inhibiting fibrinolysis
C. To enhance wound healing
D. To manage hypertension
CORRECT ANSWER: B. To reduce blood loss by inhibiting fibrinolysis
Rationale: Tranexamic acid is an antifibrinolytic agent that blocks plasminogen activation,
reducing clot breakdown and minimizing perioperative blood loss. It is particularly valuable in
procedures with high hemorrhage risk. Surgical technologists assist in timely administration and
monitor for thrombotic complications.
Question 13: Which route of medication administration provides the most rapid onset of
action in emergency situations?
A. Oral
B. Intramuscular
C. Intravenous
D. Subcutaneous
CORRECT ANSWER: C. Intravenous
Rationale: Intravenous administration delivers medications directly into systemic circulation,
ensuring immediate bioavailability and rapid onset. This is critical for emergency drugs like
epinephrine or atropine. Surgical technologists must maintain IV access and assist with
accurate, sterile medication preparation for IV push or infusion.
Question 14: What is the maximum recommended dose of lidocaine with epinephrine for
local infiltration in adults?
A. 3 mg/kg
B. 4.5 mg/kg
C. 7 mg/kg
D. 10 mg/kg
CORRECT ANSWER: C. 7 mg/kg
Rationale: The maximum dose of lidocaine with epinephrine is 7 mg/kg due to epinephrine's
vasoconstrictive effect slowing absorption and reducing systemic toxicity risk. Without
epinephrine, the limit is 4.5 mg/kg. Surgical technologists must calculate doses accurately and
verify with the surgical team to prevent local anesthetic systemic toxicity (LAST).
Question 15: Which medication is commonly used to treat malignant hyperthermia, a rare
but life-threatening reaction to volatile anesthetics?
A. Dantrolene
B. Atropine
Guide 2026 | Surgical Drugs, Anesthesia Medications,
Dosages, Safety Protocols, Sterile Field Pharmacology,
Practice Questions & Exam Prep for CST Certification
Success
Question 1: Which of the following medications is commonly used as a preoperative
antibiotic to prevent surgical site infections in clean-contaminated procedures?
A. Metronidazole
B. Cefazolin
C. Vancomycin
D. Clindamycin
CORRECT ANSWER: B. Cefazolin
Rationale: Cefazolin, a first-generation cephalosporin, is the preferred preoperative
prophylactic antibiotic for most clean-contaminated surgical procedures due to its broad
spectrum against common skin flora, favorable pharmacokinetics, and cost-effectiveness. It is
typically administered within 60 minutes before incision to ensure adequate tissue
concentrations during surgery.
Question 2: What is the primary mechanism of action of succinylcholine as a neuromuscular
blocking agent?
A. Competitive antagonism at nicotinic acetylcholine receptors
B. Inhibition of acetylcholinesterase enzyme
C. Depolarization of the motor end plate
D. Blockade of calcium release from the sarcoplasmic reticulum
CORRECT ANSWER: C. Depolarization of the motor end plate
Rationale: Succinylcholine is a depolarizing neuromuscular blocker that binds to nicotinic
acetylcholine receptors at the motor end plate, causing initial fasciculations followed by
sustained depolarization. This prevents repolarization and subsequent muscle contraction,
resulting in flaccid paralysis. Its rapid onset and short duration make it ideal for rapid sequence
intubation.
Question 3: Which irrigation solution is isotonic and preferred for urological procedures to
minimize electrolyte absorption and complications?
A. Sterile water
B. 3% saline
C. Glycine 1.5%
D. Normal saline (0.9% sodium chloride)
CORRECT ANSWER: D. Normal saline (0.9% sodium chloride)
Rationale: Normal saline is isotonic with plasma and does not cause hemolysis or significant
electrolyte shifts when absorbed during urological procedures like TURP. Glycine is used for
monopolar electrosurgery to prevent conductivity but carries risk of hyponatremia if absorbed.
Sterile water is hypotonic and can cause hemolysis; 3% saline is hypertonic and not used for
irrigation.
Question 4: When administering epinephrine with local anesthetic, what is the primary
benefit for the surgical technologist to understand?
,A. Increased risk of cardiac arrhythmias
B. Prolonged duration of anesthetic effect
C. Enhanced systemic absorption
D. Reduced need for sterile technique
CORRECT ANSWER: B. Prolonged duration of anesthetic effect
Rationale: Epinephrine causes vasoconstriction at the injection site, which slows systemic
absorption of the local anesthetic. This prolongs the duration of anesthesia, reduces bleeding at
the surgical site, and decreases the risk of systemic toxicity. Surgical technologists must be
aware of epinephrine concentrations to assist in proper medication preparation.
Question 5: Which reversal agent is specifically used to counteract the effects of
benzodiazepines such as midazolam?
A. Naloxone
B. Flumazenil
C. Neostigmine
D. Protamine sulfate
CORRECT ANSWER: B. Flumazenil
Rationale: Flumazenil is a competitive antagonist at the benzodiazepine binding site on GABA-A
receptors, rapidly reversing sedation, respiratory depression, and amnesia caused by
benzodiazepines. It is essential for surgical technologists to recognize its use in post-anesthesia
care when patients exhibit prolonged sedation.
Question 6: What is the most critical consideration when preparing heparin for intraoperative
use during vascular procedures?
A. Protecting from light exposure
B. Using a dedicated syringe to avoid contamination
C. Calculating dose based on patient weight and activated clotting time
D. Warming to body temperature before administration
CORRECT ANSWER: C. Calculating dose based on patient weight and activated clotting time
Rationale: Heparin dosing during vascular surgery is weight-based and titrated to achieve a
target activated clotting time (ACT), typically 250-300 seconds for cardiopulmonary bypass.
Accurate calculation and preparation are vital to prevent thrombosis or hemorrhage. Surgical
technologists assist in verifying doses and maintaining sterile technique during preparation.
Question 7: Which medication is classified as a non-depolarizing neuromuscular blocker and
requires reversal with neostigmine and glycopyrrolate?
A. Succinylcholine
B. Rocuronium
C. Propofol
D. Ketamine
CORRECT ANSWER: B. Rocuronium
Rationale: Rocuronium is a non-depolarizing neuromuscular blocker that competitively inhibits
acetylcholine at nicotinic receptors. Its effects are reversed by acetylcholinesterase inhibitors
like neostigmine, which increase acetylcholine levels, combined with glycopyrrolate to
,counteract muscarinic side effects. Surgical technologists must track administration times to
anticipate reversal needs.
Question 8: What is the primary purpose of administering dexamethasone intraoperatively?
A. To induce muscle relaxation
B. To reduce postoperative nausea and vomiting
C. To increase blood pressure
D. To enhance coagulation
CORRECT ANSWER: B. To reduce postoperative nausea and vomiting
Rationale: Dexamethasone, a corticosteroid, is commonly given prophylactically to reduce the
incidence and severity of postoperative nausea and vomiting (PONV). It also has anti-
inflammatory effects that may reduce edema. Surgical technologists should be familiar with its
indications to assist in timely preparation and administration.
Question 9: Which local anesthetic has the longest duration of action and is often used for
postoperative pain control via nerve blocks?
A. Lidocaine
B. Mepivacaine
C. Bupivacaine
D. Chloroprocaine
CORRECT ANSWER: C. Bupivacaine
Rationale: Bupivacaine is a long-acting amide local anesthetic with a duration of 4-8 hours,
making it ideal for peripheral nerve blocks and epidural analgesia. Its high lipid solubility allows
prolonged binding to sodium channels. Surgical technologists must recognize its cardiotoxicity
risk and ensure proper dosing and monitoring.
Question 10: What is the correct action for a surgical technologist if a medication vial appears
cloudy or contains particulate matter?
A. Shake vigorously to redistribute contents
B. Filter through a 0.22-micron filter before use
C. Discard the vial and obtain a new one
D. Warm the vial to dissolve precipitate
CORRECT ANSWER: C. Discard the vial and obtain a new one
Rationale: Cloudiness or particulate matter in a medication vial may indicate contamination,
degradation, or improper storage. Administering such medications poses risks of embolism,
infection, or adverse reactions. Surgical technologists must adhere to strict visual inspection
protocols and discard compromised products immediately.
Question 11: Which medication is used to reverse the anticoagulant effects of warfarin in
emergency surgical situations?
A. Vitamin K
B. Protamine sulfate
C. Idarucizumab
D. Andexanet alfa
CORRECT ANSWER: A. Vitamin K
, Rationale: Vitamin K is the antidote for warfarin toxicity, promoting synthesis of functional
clotting factors II, VII, IX, and X. In emergencies, fresh frozen plasma or prothrombin complex
concentrate may be given for immediate reversal, while vitamin K provides sustained
correction. Surgical technologists should anticipate preparation of reversal agents based on
patient history.
Question 12: What is the primary reason for using tranexamic acid during orthopedic or
cardiac surgery?
A. To prevent infection
B. To reduce blood loss by inhibiting fibrinolysis
C. To enhance wound healing
D. To manage hypertension
CORRECT ANSWER: B. To reduce blood loss by inhibiting fibrinolysis
Rationale: Tranexamic acid is an antifibrinolytic agent that blocks plasminogen activation,
reducing clot breakdown and minimizing perioperative blood loss. It is particularly valuable in
procedures with high hemorrhage risk. Surgical technologists assist in timely administration and
monitor for thrombotic complications.
Question 13: Which route of medication administration provides the most rapid onset of
action in emergency situations?
A. Oral
B. Intramuscular
C. Intravenous
D. Subcutaneous
CORRECT ANSWER: C. Intravenous
Rationale: Intravenous administration delivers medications directly into systemic circulation,
ensuring immediate bioavailability and rapid onset. This is critical for emergency drugs like
epinephrine or atropine. Surgical technologists must maintain IV access and assist with
accurate, sterile medication preparation for IV push or infusion.
Question 14: What is the maximum recommended dose of lidocaine with epinephrine for
local infiltration in adults?
A. 3 mg/kg
B. 4.5 mg/kg
C. 7 mg/kg
D. 10 mg/kg
CORRECT ANSWER: C. 7 mg/kg
Rationale: The maximum dose of lidocaine with epinephrine is 7 mg/kg due to epinephrine's
vasoconstrictive effect slowing absorption and reducing systemic toxicity risk. Without
epinephrine, the limit is 4.5 mg/kg. Surgical technologists must calculate doses accurately and
verify with the surgical team to prevent local anesthetic systemic toxicity (LAST).
Question 15: Which medication is commonly used to treat malignant hyperthermia, a rare
but life-threatening reaction to volatile anesthetics?
A. Dantrolene
B. Atropine
