METABOLIC PROFILE DRUGS - Immunotropic & Antiallergic Agents Flashcards
True or False. Immune system is the integrated body system of organs, tissues, cells, and cell products that differentiates self from nonself and neutralizes potentially pathogenic organisms or substances.
TRUE
True or False. Antigen is any of various substances, including toxins, bacteria, and the cells of transplanted organs, that when introduced into the body stimulate the production of antibodies. It is also called an allergen or immunogen.
TRUE
True or False. Antibody is a protein substance produced in the blood or tissues in response to a specific antigen, such as a bacterium or a toxin that destroys or weakens bacteria and neutralizes organic poisons, thus forming the basis of immunity.
TRUE
Innate immunity refers to
Antigen-nonspecific defense mechanisms that a host uses immediately or within several hours after exposure to an antigen. This is the immunity one is born with and is the initial response by the body to eliminate microbes and prevent infection
Adaptive (acquired) immunity refers to
Antigen-specific defense mechanisms that take several days to become protective and are designed to react with and remove a specific antigen. This is the immunity one develops throughout life
Allergic reaction is
A local or generalized reaction of an organism to internal or external contact with a specific allergen to which the organism has been previously sensitized
Immediate allergy reaction (type I allergic reaction) is
An allergic or immune response that begins within a period lasting from a few minutes to about an hour after exposure to an antigen to which the individual has been sensitized
Delayed allergy reaction (type IV allergic reaction) is
An allergic reaction that becomes apparent only hours after contact
Immunodeficiency
A disorder or deficiency of the normal immune response
True or False. Anaphylactic shock is a severe, sometimes fatal allergic reaction characterized by a sharp drop in blood pressure, urticaria, and breathing difficulties that is caused by exposure to a foreign substance, such as a drug or bee venom, after preliminary or sensitizing exposure.
TRUE
H1 histamine receptor subtype is distributed in
Smooth muscle, endothelium and brain
H2 histamine receptor subtype is distributed in
Gastric mucosa, cardiac muscle, mast cells and brain
Most tissue histamine is sequestered and bound in
- Granules in mast cells or basophils
- Cell bodies of histaminergic neurons
- Enterochromaffin-like cell of the fondus of the stomach
These categories of histamine H1 antagonists are noted for sedative effects
- Ethanolamines (aminoalkyl ethers); i.e. Dimedrol, Clistin
- Ethylenediamines; i.e. Suprastine
- Phenothiazines; i.e. Diprazine, Promethazine
Which category of histamine H1 antagonists is noted for the best antiemetic action?
Ethanolamines (aminoalkyl ethers); i.e. Doxylamine
These categories of histamine H1 antagonists are noted for the anticholinergic effect
- Alkylamines (propylamines); i.e. Brompheniramine
- Ethylenediamines; i.e. Suprastine
- Phenothiazines; i.e. Diprazine, Promethazine
Which category of histamine H1 antagonists is noted for the alpha-adrenoreceptor-blocking effect?
Phenothiazines; i.e. Diprazine, Promethazine
Which category of histamine H1 antagonists is noted for the highest local anesthetic effect?
Phenothiazines; i.e. Promethazine
Which category of histamine H1 antagonists is recognized for as second-generation antihistamines?
Piperidines; i.e. Loratadine, Fexofenadine
These histamine H1 antagonists are recognized for as second-generation antihistamines
- Astemizole
- Loratadine (Claritin)
- Cetirizine (Zyrtec)
Which of histamine H1 antagonists is noted for the serotonin-blocking effect?
Cyproheptadine
Which histamine H1 antagonists is a long-acting (up to 24-48 h) antihistamine drug?
Diazoline
Which of histamine H1 antagonists is noted for the ulcerogenic effect?
Diazoline
Indication for administration of histamine H1 antagonists is
- Prevention or treatment of the symptoms of allergic reactions (rhinitis, urticaria)
- Motion sickness and vestibular disturbances
- Nausea and vomiting in pregnancy (“morning sickness”)
Indications for administration of histamine H1 antagonists are
- Prevention or treatment of the symptoms of allergic reactions (rhinitis, urticaria)
- Nausea and vomiting in pregnancy (“morning sickness”)
- Treatment of sleep disorders
Side effect of first-generation histamine H1 antagonists is
Sedation
True or False. For those first-generation histamine H1 antagonists that cause significant sedation, addition of other drugs that cause central nervous system depression produces additive effects and is contraindicated while driving or operating machinery.
TRUE
True or False. Immunosuppressive drug is any of a variety of substances used to prevent production of antibodies, protein produced by the immune system in response to the presence in the body of antigens: foreign proteins or polysaccharides such as bacteria, bacterial toxins, viruses, or other cells or proteins.
TRUE
Immunosupressive effect of glucocorticoids is caused by
Reducing concentration of lymphocytes (T and B cells) and inhibiting function of tissue macrophages and
other antigen-presenting cells
Antiallergic effect of glucocorticoids is caused by
- Suppression of leukocyte migration and stabilizing lysosomal membranes
- Reverse the capillary permeability associated with histamine release
- Suppression of the immune response by inhibiting antibody synthesis
The Immunosuppressive agent is
- Corticosteroids
- Cyclosporine
- Tacrolimus (FK 506)
Class of cyclosporine A is
Immunosuppressive agents
Mechanism of action of cyclosporine A is
Inhibits calcineurin
Side effect of cyclosporine A is
- Tremor
- GI disturbance
- Hepatotoxicity
Side effect of cyclosporine A is
Tremor
Side effect of cyclosporine A is
GI disturbance
Indication of cyclosporine A is
Idiopathic nephrotic syndrome
Half-life of cyclosporine A is
19 hours
Class of I.V. IgG preparation is
Immunoglobulins
Mechanism of action of I.V. IgG preparation is
Compete for Fc receptors with autoantibodies
Half-life of I.V. IgG preparation is:
21 days
Indication for I.V. IgG preparation administration is
Prophylaxis of certain infections
Cytotoxic agents are
- Azathioprine
- Leflunomide
- Cyclophosphamide
Class of sirolimus (rapamycin) is
Immunosuppressive agents
Mechanism of action of sirolimus (rapamycin) is
Inhibits calcineurin
Monoclonal antibodies is
- Trastuzumab
- Rituximab
- OKT-3
Class of OKT-3 is
Monoclonal antibodies
Half-life of OKT-3 is
18-24 hours
The indication for interferon gamma administration is
Chronic granulomatous disease
The side effect of interferon gamma is
Fatigue
Half-life of interferon gamma is
25-35 minutes
Half-life of interferon alpha is
4-16 hours
The indication for interferon alpha administration is
- Hepatitis C virus infection
- Kaposi’s sarcoma
- Condyloma acuminatum
Class of tacrolimus (FK-506) is
Immunosuppressive agents
Mechanism of action of tacrolimus (FK-506) is
Inhibits calcineurin
Immunomodulating agent is
Levamisole
Immunomodulating agents are
Tacrolimus (FK-506)
Mechanism of action of levamisole is
Increase the number of T-cells