Friday, June 03, 2005

Pharm - Practice Q

Timing Trouble
The nurse knows that it is MOST important for which of the following patients to receive their scheduled medication on time?

(1) A patient diagnosed with myasthenia gravis receiving pyridostigmine bromide (Mestinon).
(2) A patient diagnosed with bipolar disorder receiving lithium carbonate (Lithobid).
(3) A patient diagnosed with tuberculosis receiving isonicotinic acid hydrazide (INH).
(4) A patient diagnosed with Parkinson's disease receiving levodopa (L-Dopa).

Answer, rationale, and help with breaking down the question in the comments.

1 comment:

Bonnie Boss said...

The Correct Answer to the Question above is:
(1)

Reworded question: Which medication, if given late, might cause harm to the patient?
Strategy: Think about each answer.

Needed Info: Myasthenia gravis is a deficiency of acetylcholine at myoneural junction; symptoms include muscular weakness, produced by repeated movements, that soon disappears following rest; diplopia; ptosis; impaired speech; and dysphagia.

Category: Analysis/Physiological Integrity

(1) A patient diagnosed with myasthenia gravis receiving pyridostigmine bromide (Mestinon)—CORRECT: Mestinon is a cholinesterase inhibitor which increases acetylcholine concentration at the neuromuscular junction; early administration can precipitate a cholinergic crisis; late administration can precipitate myasthenic crisis
(2) A patient diagnosed with bipolar disorder receiving lithium carbonate (Lithobid)—Lithobid is a mood stabilizer; targeted blood level = 1-1.5 mEq/L
(3) A patient diagnosed with tuberculosis receiving isonicotinic acid hydrazide (INH)—INH is given in a single daily dose; side effects include hepatitis, peripheral neuritis, rash, and fever
(4) A patient diagnosed with Parkinson's disease receiving levodopa (L-Dopa)—L-Dopa is thought to restore dopamine levels in extrapyramidal centers; sudden withdrawal can cause parkinsonian crisis; priority is to administer Mestinon