Which of the following is/are FDA-approved labeled indication(s) for Sulfamethoxazole with Trimethoprim?
Upper respiratory tract infections
Constipation associated with opioid use
Urinary tract infections
Headache symptoms from a common cold
The Correct Answer is C
A. Upper respiratory tract infections are frequently viral in origin, rendering this sulfonamide combination ineffective. While it covers some respiratory pathogens, it is not a primary labeled indication for general upper respiratory infections. Clinical use is typically reserved for specific bacterial complications.
B. Constipation associated with opioid use results from activation of mu-opioid receptors in the gastrointestinal tract. This antimicrobial agent lacks any pharmacological activity on enteric motility or opioid receptors. It is exclusively an anti-infective and has no role in managing bowel dysfunction.
C. Urinary tract infections are a primary labeled indication for this synergistic combination. Sulfamethoxazole inhibits dihydropteroate synthase, while trimethoprim inhibits dihydrofolate reductase. This sequential blockade of folic acid synthesis provides potent bactericidal activity against common uropathogens like Escherichia coli.
D. Headache symptoms from a common cold are typically managed with analgesics such as acetaminophen or nonsteroidal anti-inflammatory drugs. Sulfamethoxazole with trimethoprim does not possess analgesic or antipyretic properties. It is not indicated for the symptomatic relief of viral upper respiratory syndromes.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. Valtrex is the brand name for valacyclovir hydrochloride, an L-valyl ester prodrug of acyclovir. It undergoes rapid and nearly complete conversion to acyclovir by first-pass intestinal and hepatic metabolism. This process significantly increases the oral bioavailability of the antiviral compound.
B. Zovirax is the proprietary name for acyclovir, the active metabolite of valacyclovir hydrochloride. While both medications treat herpesvirus infections, they are distinct pharmaceutical products with different dosing frequencies. Zovirax is not the brand name for the prodrug valacyclovir.
C. Amerge is the brand name for naratriptan, a selective serotonin receptor agonist used for migraine treatment. It functions by stimulating 5-HT 1B and 1D receptors to cause cranial vasoconstriction. It lacks any antiviral properties and is not related to valacyclovir.
D. Relpax is the brand name for eletriptan, another member of the triptan class used for acute migraine. It modulates neurogenic inflammation and vasoconstriction via serotonin receptor agonism. It is not an antiviral agent and does not contain valacyclovir hydrochloride.
Correct Answer is D
Explanation
A. Topiramate is sometimes used off-label for alcohol dependence due to its modulation of glutamate and gamma-aminobutyric acid neurotransmission. However, it currently lacks formal FDA approval for this specific indication. Clinical trials show reduced craving, but regulatory labeling remains absent.
B. While this agent is investigated for binge eating disorder and weight loss in combination with phentermine, it is not individually FDA-approved for eating disorders. Its pharmacodynamic effects on appetite are secondary to its carbonic anhydrase inhibition. It remains an off-label use.
C. Topiramate is not indicated for the treatment of insomnia. Although sedation is a common adverse effect, its complex mechanism involving voltage-gated sodium channel blockade is not appropriate for primary sleep induction. No FDA label supports its use as a hypnotic.
D. Topiramate is FDA-approved for migraine prophylaxis in patients aged 12 years and older. It reduces migraine frequency by stabilizing hyperexcitable neurons through multiple mechanisms. These include blocking voltage-dependent sodium channels and enhancing GABA-A receptor-mediated inhibitory neurotransmission in the brain.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.