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Sunday, March 29, 2020

PTCB - Chapter 18 - Common Drugs and Their Uses - Key Concepts

Drug Names and Classes
- A drug's name begins with a chemical name
- Marketed drugs under patent protection have one nonproprietary or generic name and one proprietary or brand name
- The United States Adopted Names Council (USAN) designates the official nonproprietary names for drugs

Classification Schemes
- There are various systems for classifying drugs: by disorder, body system affected, type of receptor acted on, type of action, etc

Analgesics
- Analgesic drugs create a state in which the pain from a painful medical condition is reduced or not felt
- Common types of analgesics include salicylates, acetaminophen, nonsteroidal anti-inflammatory, and opiate type

Anesthetic Agents
- Anesthetics cause an absence of sensation or pain
- Anesthetics are classified as local or general
- Local anesthetics block pain conduction without causing a loss of consciousness
- General anesthetics are administered by inhalation or intravenously by an anesthesiologist and depress the central nervous system to the level of unconsciousness

Anti-infectives
- Anti-infectives treat diseases produced by microorganisms such as bacteria, viruses, fungi, protozoa, and parasitic worms

Antineoplastics
- Antineoplastics inhibit new growth of cancer cells
- Side effects caused by many antineoplastic agents are often uncomfortable and serious
- Pharmacists and pharmacy technicians must be very careful with all calculations associated with drugs that are used to treat cancer

Cardiovascular Agents
- Cardiovascular agents include antianginals, antiarrhythmics, antihypertensives, vasopressors, antihyperlipidemics, thrombolytics, and anticoagulants

Dermatologicals
- The skin is the body's protective barrier and is the largest organ of the body
- Dermatologicals are drugs used to treat diseases or conditions related to the skin

Electrolytic Agents
- Electrolytes are water soluble substances that are contained in our body fluids as salts
- Electrolyte balance is important for healthy body function

Gastrointestinal and Urinary Tract Agents
- Gastrointestinal agents are used to treat disorders of the stomach and/or intestines
- Urinary agents are used to treat conditions affecting the flow of urine

Hematological Agents
- Each stage in the formation of blood clots can be affected by intrinsic clotting factors and drugs
- Hematopoietics are drugs that treat various forms of anemias
- Hemostatic drugs are used to treat or prevent excessive bleeding

Hormones and Modifiers
- Hormones are secreted by glands of the endocrine system
- The pancreas secretes the hormones insulin and glucagon. Insulin and glucagon are involved in regulating serum glucose.

Immunobiologic Agents and Vaccines
- Immune globulins provide passive immunity
- Vaccines provide active immunity
- Immune globulins provide a shorter period of protection than vaccines

Musculoskeletal Agents
- Musculoskeletal agents are used to treat rheumatoid arthritis, osteoarthritis, gout, osteoporosis, and muscle spams

Neurological Agents
- Several common disorders are affected by abnormalities in neurotransmitter release and/or response and include Parkinson's disease, Alzheimer's disease, epilepsy, migraine headaches, multiple sclerosis, and attention deficit hyperactivity disorder

Ophthalmic and Otic Agents
- Ophthalmic agents are used to treat conditions such as glaucoma, eye infection, eye pain, and inflammation. They are also used for eye examinations and in preparation for surgery.
- Otic agents are used to treat conditions including accumulation of earwax and infections of the outer ear

Psychotropic Agents
- Psychotropic agents are used to treat conditions such as bipolar disorder, anxiety, depression, schizophrenia, and drug abuse

Respiratory Agents
- Common respiratory disorders include asthma, allergy, emphysema, croup, bronchitis, chronic obstructive pulmonary disease, and pneumonia

PTCB - Chapter 18 - Common Drugs and Their Uses - Definitions

STEM ------- DRUG CLASS
-alol               combined alpha and beta blockers (used for high BP)
-andr-             androgens
-anserin          serotonin 5-HT2 receptor antagonist
-arabine          antineoplastics (anticancer drugs)
-ase                 enzymes
-azepam          antianxiety agents (diazepam type)
-azosin            antihypertensive (prazosin type)
-bactam           beta-lactamase inhibitors (penicillin and antibiotic)
-bamate           tranquilizers/antiepileptic
-barb                barbituric acid derivatives
-butazone         anti-inflammatory analgesics (phenylbutazone type)
-caine               local anesthetic
-cef                  cephalosporins (antibiotic)
-cillin               penicillins
-conazole         antifungals (miconazole type)
-cort-               cortisone derivatives (anti inflammatory)
-curium           neuromuscular blocking agent
-cycline           antibiotics (tetracycline)
-dralazine        antihypertensives (hydrazinephthalazines)
-erg-                 ergot alkaloid derivatives
estr-                  estrogens
-fibrate             antihyperlipidemics
-flurane            inhalation anesthetics
-gest-                progestins
-irudin              anticoagulants (hirudin tyoe)
-leukin             interleukin-2 derivative
-lukast             leukotriene antagonist
-mab                monoclonal antibodies
-mantadine      antivirals
-monam           monobactam antibiotics
-mustine          antineoplastics
-mycin             antibiotic
-olol                 beta-blockers
-olone               steroids
-oxacin             antibiotics (quinolone derivatives)
-pamide            diuretics (sulfamoylbenzoic acid derivative)
-pamil               coronary vasodilators
-parin                heparin derivative
-peridol             antipsychotics (haloperidol type)
-poetin              erythropoietins
-pramine           antidepressants (imipramine type)
-pred                 prednisone derivatives
-pril                   antihypertensives (ACE inhibitors)
-profen              anti-inflammatory/analgesic agents (ibuprofen type)
-rubicin             antineoplastic antibiotics (daunorubiein type)
-sartan               angiotensin II receptor antagonist
-sertron             serotonin 5-HT3 receptor antagonist
-sulfa                 antibiotics (sulfonamide derivatives)
-terol                 bronchodilators
-thiazide            diuretics (thiazide diuretics)
-tiazem              calcium channel blockers (diltiazem derivatives)
-tocin                 oxytocin derivatives
-trexate              antimetabolites (folic acid derivatives)
-triptyline          antidepressants
-vastatin             antihyperlipidemics (HMG-CoA inhibitors)

Homeostasis
- the state of equilibrium of the body

Neurotransmitter
- chemical released by nerves that interact with receptors to cause an effect

Blocker
- another term for antagonist drug, because antagonist block the action of neurotransmitters

Mimetic
- another term for an agonist, because agonists imitate, or "mimic", the action of the neurotransmitter

Type of Analgesics
- salicylates
- NSAIDs
- non-aspirin, non-NSAID
- opiates

Type of Anesthetic Agents
- local and general

Type of Anti-infectives
- antibiotics, antivirals, antifungals
- antimycobacterials, antiprotozoals, anthelmintics

Analgesic drugs create a state called analgesia.

Analgesia
- a state in which pain is not felt even though a painful condition exist.

Antipyretic
- reduces fever

Common Analgesic Drugs
TYPE ----------------------------- BRAND ------------------- GENERIC
Salicylates                                  Bayer                                acetylsalicylic acid (aspirin)
Non-aspirin, non-NSAID           Tylenol, Ofirmev              acetaminophen
NSAID                                        Motrin, Advil                   ibuprofen
NSAID                                        Naprosyn                          naproxen
Opiates                                        MS Contin                        morphine
Opiates                                        Demerol                           meperidine

Salicylates
- relieves mild to moderate pain
- anti-inflammatory
- antipyretic

Acetaminophen (non-aspirin, non-NSAID)
- relieves mild to moderate pain
- antipyretic

NSAID (nonsteroidal anti-inflammatory drug)
- more potent than salicylates
- relieve mild to moderate pain
- anti-inflammatory
- antipyretic

Opiate-type
- for severe pain
- addicting

Anesthetics cause an absence of sensation or pain.
Local anesthetics block pain conduction from peripheral nerves to the central nervous system (brain and stem) without causing a loss of consciousness.
General anesthetics depress the central nervous system to the level of unconsciousness

Common Local Anesthetic
TYPE ----------- BRAND ----------- GENERIC
Ester                  Novocain                procaine
Ester                  n/a                           tetracaine
Amide               Xylocaine                lidocaine
Amide               Marcaine                 bupivacaine
Other                 Sucrets                     dyclonine
* Cocaine first recognized local anesthetic. Schedule II.

Common General Anesthetics
TYPE ----------- BRAND ---------- GENERIC
inhalation           Forane                  isoflurane
inhalation           Ultane                   sevoflurane
inhalation           Suprane                 desflurane
IV                       Diprivan                propofol
IV                       Valium                   diazepam
IV                       Amidate                 etomidate

Four Stages of General Anesthesia
Stage 1 - Analgesia
-- euphoria with loss of pain and consciousness
Stage 2 - Excitement
-- increase in sympathetic nervous system effects such as blood pressure, heart and respiratory rate
Stage 3 - Surgical Anesthesia
-- the stage of anesthesia in which surgery can be safely conducted
Stage 4 - Medullary Paralysis
-- an overdose of anesthesia that paralyzes the respiratory and heart centers of the medulla, leading to death

Anti-infectives treat disease produced by microorganisms such as bacteria, viruses, fungi, protozoa, and parasitic worms.

Other forms of anti-infectives include:
- antimycobacterials (agents that treat tuberculosis, leprosy, and the MAC complex in AIDS)
- antiprotozoals (agents that treat malaria, vaginitis, and sleeping sickness)
- anthelmintics (agents that treat parasitic worms in the GI tract)

Types of antibiotic action
- damage bacterial cell wall (penicillins and cephalosporins)
- modify protein synthesis (erythromycin and tetracycline)
- modify energy metabolism (sulfonamides)
- modify DNA synthesis (ofloxacin and ciprofloxacin)

Classes of Anti-infectives
- antibiotics (antimicrobials)
   >>> suppress growth of other microorganisms
   >>> Alexander Fleming, penicillin
   >>> can either be bacteriostatic (inhibit bacterial growth or bactericidal (bacteria killing)
- antivirals
   >>> inhibit the replication of viruses
   >>> protease inhibitors - an antiviral used for HIV and hepatitis C that blocks the enzyme responsible for viral replication
- antifungals
   >>> treat fungal infections
   >>> fungal cell is destroyed as the drug prevents cell permeability and nutrition

Antineoplastics inhibit the new growth of cancer cells or neoplasms.

Neoplasm
- a new and abnormal tissue growth, often referring to cancer cells

Malignancy means a life threatening, cancerous group of cells or tumor is present.
Metastasis - when cancer cells spread beyond their original site.
Remission - a state in which cancer cells are inactive

Lymphocyte
- a type of white blood cells that helps the body defend against bacteria and diseased cells

Class of Antineoplastics
- Antimetabolites
  >>> inhibit cell growth and replication by mimicking natural metabolites and taking their place within the cells. Fake metabolites inhibit the synthesis of important cellular enzymes, including DNA
- Alkylating agents
  >>> interfere with mitosis or cell division by binding with DNA and preventing cellular replication
- Plant Alkaloids
  >>> derived from natural products or semisynthetically produced using natural products, some of these drugs inhibit the enzyme topoisomerase
  >>> Topoisomerase is required for molecular cell growth or mitosis and therefore certain plants alkaloids interfere with cellular DNA replication
- Hormones
   >>> hormone therapy can be used to treat certain cancers that require hormones to grow. Hormone therapy works by preventing cancer cells from using the hormones they need to grow
- Antitumor Antibiotics
  >>> drugs that interact directly with cancer cells to prevent the DNA from functioning normally
- Radioactive Isotopes
   >>> used to kill cancer cells in a targeted area

Same Common Antineoplastics
TYPE ------------------------------------------ BRAND ---------------- GENERIC
Antimetabolite                                            n/a                                 fluorouracil
Antimetabolite                                            Rheumatrex                  methotrexate
Alkylating agent/nitrogen mustard             Mustargen                     mechlorethamine
Alkylating agent/nitrosurea                        BiCNU                          carmustine
Plant alkaloid                                              n/a                                  vincristine
Plant alkaloid                                              n/a                                  vinblastine

Cardiovascular agents include antianginals, antiarrhythmics, antihypertensives, vasopressors, antihyperlipidemics, thrombolytics, and anticoagulants

Arrhythmia
- an abnormal heart rhythm

Electrocardiogram (EKG or ECG)
- a graph of the heart's rhythms

Cardiac cycle
- the contraction and relaxation of the heart that pumps blood through the cardiovascular system

Myocardium
- heart muscle

Thrombus
- a blood clot

Embolism, Embolus
- a clot that has traveled in the bloodstream to a point where it obstructs flow; blood clot

Systolic Pressure
- the maximum blood pressure when the heart contracts; the first number in a blood pressure reading

Diastolic Pressure
- the minimum blood pressure when the heart relaxes; the second number in a blood pressure reading

Classes of Cardiovascular Agents by mechanism of action
- beta blockers
   >>> reduce the oxygen demands of the heart muscle
   >>> used to treat high blood pressure or arrhythmias
- calcium channel blockers
   >>> relax the heart by reducing heart conduction
   >>> used to treat high blood pressure or arrhythmias
- diuretics
   >>> decrease blood pressure by decreasing blood volume
   >>> decrease volume by increasing the elimination of salts and water through urination
- ACE inhibitors
   >>> "-pril" drugs, ace inhibitors relax the blood vessels
- vasodilators
   >>> relax and expand the blood vessels

Some Common Cardiovascular Drugs by Mechanism of Action
TYPE ------------------------------ BRAND ------------------- GENERIC
beta blocker                                 n/a                                    propranolol
beta blocker                                 tenormin                          atenolol
beta blocker                                 corgard                             nadolol
beta blocker                                 Lopressor                         metoprolol
calcium channel blocker              calan                                verapamil
calcium channel blocker              Norvasc                            amlodipine
calcium channel blocker              Procardia                          nifedipine
calcium channel blocker              Cardizem                          diltiazem
diuretics                                        Lasix                                furosemide
diuretics                                        microzide                         hydrochlorothiazide
diuretics                                        Aldactone                         spironolactone
ACE inhibitor                               capoten                             captopril
ACE inhibitor                               Vasotec                             enalapril
ACE inhibitor                                Zestril                              lisinopril
vasodilator                                     n/a                                    hydralazine

Dermatologicals refers to a drug used to treat a condition or disease related to the skin

Integumentary system
- the body covering, ie, skin, hair, and nails

Electrolytes are water soluble substances that conduct an electric current as salts

Immune Globulins
- Pathogens for which animal antibodies may be used for immune globulins:
   >>> Diphtheria (using Antitoxin, USP)
   >>> Rabies (using Antirabies serum)
   >>> Botulism
   >>> Black Widow Spider Venom
- Human antibodies are used in immune globulins in the treat of:
   >>> measles
   >>> pertussis
   >>> mumps
   >>> tetanus
   >>> hepatitis A and B

Rheumatoid arthritis
- a disease in which the body's immune system attacks joint tissue

Gout
- a painful inflammatory condition in which excess uric acid accumulates in the joints

Uricosuric drugs
- drugs used to treat gout that increase the elimination of uric acid

Osteoarthritis
- a disorder characterized by weight bearing bone deterioration, decreasing rate of motion and causing pain and deformity

PTCB - Chapter 17 - Other Environments - Key Concepts

Mail Order Pharmacy
- Mail order pharmacy is used for maintenance therapy for such chronic conditions as depression, gastrointestinal disorders, heart disease, hypertension, and diabetes.
- Mail order pharmacies must follow federal and state requirements in processing prescriptions, but are not necessarily licensed in each state to which they send medications.
- Mail order pharmacies are generally large scale operations that are highly automated.
- Pharmacists review mail order prescriptions before and after filling.

Long Term Care
- Because of limited resources, most long term care facilities contract out dispensing and clinical pharmacy services.

Home Infusion
- Home care is supervised by a registered nurse who works with a physician, pharmacist, and others to administer a care plan that involves the patient or another caregiver.
- The fastest growing area of home health care is home infusion.
- Infusion pumps are available for specific therapies or multiple therapies, and include ambulatory pumps that can be worn by patients.
- In home infusion, the patient or caregiver is educated about the therapy: how to self administer, monitor, report problems, and so on.
- The primary therapies provided by home infusion services are: antibiotic therapy, parenteral nutrition, pain management, and chemotherapy.
- The same rules apply to preparing parenteral admixtures in the home setting as in the hospital.

Nuclear Pharmacy
- Nuclear pharmacies prepare radiopharmaceuticals that are used for diagnosis and treatment of disease.
- Nuclear pharmacies are typically located for easy access to hospitals and clinics where diagnostic testing is performed.
- Radiation safety is regulated on the federal level by the Nuclear Regulatory Commission (NRC) and the Department of Transportation (DOT).

PTCB - Chapter 17 - Other Environments - Definitions

Chronic condition
- a continuing condition that requires ongoing treatment for a prolonged period

Maintenance medication
- a medication that is required on a continuing basis for the treatment of a chronic condition

Acute condition
- a sudden condition requiring immediate treatment

Distributive pharmacist
- make sure long term care patients receive the correct medications order

Consultant pharmacist
- develops and maintains an individual pharmaceutical plan for each long term care patient

Automated dispensing system
- a system in which medications are dispensed from an automated unit at the point of use upon confirmation of an order communicated by computer from a central system

Home care agencies
- home nursing care business that provide a range of health care services, including infusion


Saturday, March 28, 2020

PTCB - Chapter 16 - Hospital Pharmacy - Key Concepts

Hospital Pharmacy
- Patient rooms are divided into groups called nursing units or patient care units; patients with similar problems are often located on the same unit.

Hospital Technician Roles
- Hospital pharmacy technicians have many roles and responsibilities and are often cross trained to work in different areas of the pharmacy.

Hospital Pharmacy Areas
- The inpatient pharmacy is responsible for medication preparation and distribution.

Hospital Formulary
- Since hospitals cannot stock every medication available, most have a hospital formulary, which is a list of medications the pharmacy keeps on its shelves and from which doctors can order.

Communications and Computer Systems
- There are several ways the pharmacy communicates with other areas of the hospital, including telephones, fax machines, computerized printouts, pneumatic tubes, and in person.

Medical Records
- Medical records are detailed chronological accounts of a patient's medical history and care received. The medical record may be in the form of a paper chart or electronic system.

Medication Orders
- In the hospital, all drugs ordered for a patient are written on a medication order form or are electronically entered through a computerized physician order entry (CPOE) system.

Order Processing
- When preparing a medication, the technician must pay close attention to the drug name, dosage form, concentration or strength, quantity, and expiration date; and for IV's, solution and volume.

Inventory Control
- To assist in the process of ordering inventory, par levels are assigned to each drug. Par is the quantity of drug that should be kept on the pharmacy shelf or in automated dispensing systems.

Organization of Medications
- In hospital pharmacies, medications are organized in alphabetical order using generic names.

Unit Dose System
- In the hospital, medications are often packed in individual packets that contain the amount of medication needed for each individual dose, unit dose.

Sterile Products
- Technicians may be responsible for preparing small and large volume parenteral, parenteral nutrition therapy, and chemotherapy.

General Hospital Issues
- Needles or other items that may cut or puncture the skin should always be thrown away in designated sharps containers.

Hospital Pharmacy Calculations
- Hospital pharmacy technicians perform many calculations on a daily basis, all of which are critically important to a patient's health and safety. Some examples include calculations for preparing small volume parenterals, calculations for timing medications, and flow rate calculation.


PTCB - Chapter 16 - Hospital Pharmacy - Definitions

Nurses' station
- work station for medical personnel located on a nursing unit

Inpatient pharmacy
- a pharmacy located in a hospital that services only those patients in the hospital and its ancillary areas

Pharmacy satellite
- a branch of the inpatient pharmacy responsible for preparing, dispensing, and monitoring medication for specific patient areas

Central Pharmacy
- the main inpatient pharmacy in a hospital that has pharmacy satellites
- it is the place where most of the hospital's medications are prepared and stored

Batching
- preparation of large quantities of unit dose oral solutions/suspensions or small volume parenteral for future use

Clean room
- area designed for the preparation of sterile products

Unit inspection
- a review of a nursing unit to ensure compliance with hospital medication policies

Outpatient Pharmacy
- a pharmacy attached to a hospital that services patients who have left the hospital or who are visiting doctors in a hospital outpatient clinic

Formulary
- a list of drugs stocked at the hospital that have been selected based on therapeutic factors as well as cost

Closed Formulary
- a type of formulary that requires physicians to order only those medications on the formulary list

Non-Formulary
- drugs not on the formulary list and not regularly stocked in the pharmacy

Therapeutic interchange
- a policy approved by the hospital P&T Committee that allows the pharmacist to change a medication order to a therapeutically equivalent formulary medication

Pneumatic tube
- a system that shuttles objects through a tube using compressed air as the force; commonly used in hospitals for delivery of medication

Electronic medical record (EMR) or electronic health record (EHR)
- a computerized patient medical record

CPOE
- a system in which the physician or agent of the physician enters directly into the hospitals computer system

Standing order
- a standard medication order for patients to receive medication at schedule intervals

PRN order
- an order for medication to be administered only on an as needed basis

STAT order
- an order for medication to be administered immediately

Medication administration record (MAR)
- a form that tracks the medications administered to a patient

Final filter
- a device used to remove particulate matter
- the filter should be placed at the end point of an IV line just before it enters a patient's vein

Drip rounds
- a process in which the pharmacy technician goes to specific nursing units to find out what IV drips will be needed later that day

Drug recall
- the voluntary or involuntary removal of a drug product by the manufacturer
- it usually only pertains to a particular shipment or lot number

Par
- the amount of drug product that should be kept on the pharmacy shelf
- each drug product may have a different par value
- par levels may also be assigned to drug products in automated dispensing cabinets

Emergency drug procurement
- to quickly obtain a medication not currently in stock in the pharmacy in situations where the drug is urgently needed

Extemporaneous compounds
- medications that must be prepared following a specific recipe or formula, usually because they are not available commercially

Bulk compounding log
- a record of medications that are compounded in the pharmacy for nonspecific patients
- information must include a list of all the ingredients, amounts used, manufacturer, lot numbers and expiration dates of each specific ingredient

Reconstitute
- addition of water or other diluent to commercially made drug bottles or vials in order to make a solution or suspension from a premade powder form of the drug
- include oral or parenteral drug

Unit dose
- a package containing the amount of a drug required for one dose

Automated dispensing system
- a system in which medications are dispensed from an automated unit at the point of use

IVPB (intravenous piggyback)
- a small volume parenteral that will be added into or "piggyback" into a large volume parenteral (LVP)

Total Parenteral Nutrition (TPN)
- protein, carbohydrates and essential nutrients to be given to the patient through an IV line

Epidural
- s sterile, preservative free medication administered into a patient's epidural space (located near the spinal cord and backbone)

Short stability
- medication that will expire soon after preparation (ie. within 1-6 hours after preparation)

Code Cart
- a locked cart of medications and other medical equipment designed for emergency use only


PTCB - Chapter 15 - Community Pharmacy - Key Concepts

Community Pharmacy
- In addition to prescription drugs, community pharmacies sell over the counter medications as well as other health and beauty products.
- The community pharmacist's role in counseling and educating patients has been steadily increasing.

Regulations
- Pharmacists and pharmacy technicians must be knowledgeable regarding the many federal and state regulations that affect the practice of pharmacy.

Organizations
- Pharmacies have basic space and equipment requirements that may vary slightly from state to state but generally include a prescription counter to work on, proper storage areas for drugs, designated refrigerators for drugs, equipment for compounding, a sink, computer system, and areas for dispensing prescriptions.

Customer Service
- Technicians should always response to customers in a positive and courteous way.

Processing Prescriptions
- In the case of a patient requesting an early refill of a controlled substance, involve the pharmacist right away.
- Processing new prescriptions involves entering patient information and prescription drug information, as well as billing information.

Preparing the Prescription
- Whenever the prescription system flags drug interactions and allergy conflicts, alert the pharmacist so that he or she can evaluate the significance of the flag.
- Every drug product has a unique, 11-digit national drug code (NDC) number that can used when filling a prescription to verify the correct product has been retrieved from stock.
- All dispensed prescription vials and bottles must have a safety cap or child resistant cap, unless the patient requests an easy open or non child resistant cap.
- Auxiliary labels identify important usage information, including specific warnings or alerts on: administration, proper storage, possible side effects, and potential food and drug interactions.
- As a final step of the preparation process, the final product and all paperwork, including the original prescription, is organized for the pharmacist's final check.

Customer Pick Up
- Customer signatures in a log are required for Medicaid and most third party insurers or HMO prescriptions, along with Schedule V controlled substances, poisons, and certain other prescriptions (depending upon the state).

Other Duties
- With the exception of behind the counter OTC medications, OTC products may be bought freely by customers, but they are not without risks. The technician may direct customers to a product but should involve the pharmacist when making recommendations.
- Ordering stock is often a responsibility of the pharmacy technicians.
- The pharmacy technician is generally responsible for keeping the pharmacy clean, neat, and in proper working order.