A nurse caring for a client receiving doxycycline for the treatment of Lyme's Disease. Which statement below should be included in the client's teaching plan?
Regular sun exposure is needed to maximize drug efficacy
Avoid water while taking this medication
Take this medication with antacids to relieve gastrointestinal symptoms
Avoid dairy products when taking this medication
The Correct Answer is D
A. Regular sun exposure is needed to maximize drug efficacy: This is incorrect; in fact, doxycycline can cause photosensitivity, and sun exposure should be minimized.
B. Avoid water while taking this medication: Water should be taken with doxycycline to help prevent esophageal irritation.
C. Take this medication with antacids to relieve gastrointestinal symptoms: Antacids can also interfere with doxycycline absorption, so they should be avoided.
D. Avoid dairy products when taking this medication: Dairy products can bind to doxycycline and reduce its absorption in the gastrointestinal tract, which decreases its effectiveness. The client should avoid dairy when taking the medication.
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Correct Answer is ["A","B","D","E"]
Explanation
A. Alopecia: Alopecia is a common side effect of chemotherapy because these medications target rapidly dividing cells, including hair follicles.
B. Bone marrow suppression: Chemotherapy can cause bone marrow suppression, leading to decreased production of blood cells, increasing the risk of anemia, infections, and bleeding.
C. Extrapyramidal symptoms: Extrapyramidal symptoms are associated with antipsychotic medications, not chemotherapy. They include symptoms like tremors, rigidity, and bradykinesia.
D. Bleeding: Due to bone marrow suppression, chemotherapy can decrease platelet counts, increasing the risk of bleeding.
E. Nausea: Nausea and vomiting are common adverse effects of chemotherapy due to the irritation of the gastrointestinal lining and activation of the vomiting center in the brain.
Correct Answer is C
Explanation
A. Stops fungal growth: Methotrexate is not an antifungal medication. This mechanism of action applies to drugs like azoles or polyenes, which are used to treat fungal infections.
B. Alters pH level: Altering pH is a mechanism used by some antacids or alkalinizing agents, not methotrexate.
C. Inhibits replication by blocking folic acid synthesis: Methotrexate is an antimetabolite that inhibits dihydrofolate reductase, an enzyme involved in folic acid synthesis. This inhibition impairs DNA synthesis, which is crucial in treating leukemia and other cancers.
D. Inhibits helper T cells: This mechanism of action is more closely related to immunosuppressive agents like cyclosporine or tacrolimus, which are used for preventing transplant rejection.