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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
has limited efficacy
Grammar usage guide and real-world examplesUSAGE SUMMARY
"has limited efficacy" is a perfectly correct and usable phrase in written English.
You can use it to describe something, such as a procedure, that fails to produce a desired result in certain situations. For example, "While the new medical treatment has had considerable success, it still has limited efficacy in treating certain types of illnesses."
✓ Grammatically correct
Science
News & Media
Formal & Business
Alternative expressions(18)
has limited effectiveness
has limited impact
has modest efficacy
has limited potency
has limited usefulness
has limited efficiency
is of questionable value
has limited effect
has limited validity
has limited ability
has limited space
has demonstrated efficacy
has limited scope
has limited mobility
has limited performance
has limited capacity
has limited relevance
has limited practicality
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
47 human-written examples
If this is not the Commander in Chief's most commanding moment, it may be because he knows that the testing regimen, at least as it currently is implemented, has limited efficacy for students when it comes to helping them, uh, learn.
News & Media
Monotherapy with nortriptyline has limited efficacy.
However, RFA has limited efficacy and is quite expensive.
Artemisinin, a potential antileishmanial compound with poor bioavailability and stability has limited efficacy in visceral leishmaniasis.
Unfortunately, BCG has limited efficacy against the adult, pulmonary form of tuberculosis.
Science
Medical treatment of non-atypical endometrial hyperplasia with oral progestogens has limited efficacy and poor compliance.
Human-verified similar examples from authoritative sources
Similar Expressions
13 human-written examples
Pharmacological agents include a limited choice like citrate and thiazide diuretics, which have limited efficacy in addition to their less tolerability [ 10, 11].
Some of the new cancer drugs hold immense promise, but others have limited efficacy and are exorbitant.Nevertheless, a rational debate is elusive.
News & Media
But it had limited efficacy against dengue 2, one of four dengue virus serotypes in circulation.
Science & Research
Historically, autotaxin inhibitors had poor bioavailability profiles and thus had limited efficacy in vivo.
Science
Currently available treatments for autoimmune diseases, such as steroid and nonsteroid immunosuppressive medicines, have limited efficacy.
Science
Expert writing Tips
Best practice
When discussing medical treatments or interventions, use "has limited efficacy" to accurately convey that the treatment's effectiveness is not absolute and may not work for all patients or situations. This promotes realistic expectations and informs decision-making.
Common error
Avoid using "has limited efficacy" when the treatment is completely ineffective. The phrase implies some level of positive effect, even if small. If there's no demonstrable benefit, use stronger terms like "ineffective" or "useless."
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "has limited efficacy" functions as a descriptor, primarily acting as an adjective phrase that modifies a noun (often a treatment, drug, or method). It indicates a qualified or restricted level of effectiveness. As Ludwig AI suggests, it describes something that fails to produce a desired result in certain situations.
Frequent in
Science
88%
News & Media
7%
Formal & Business
5%
Less common in
Encyclopedias
0%
Wiki
0%
Reference
0%
Ludwig's WRAP-UP
In summary, "has limited efficacy" is a commonly used and grammatically correct phrase that conveys a nuanced assessment of something's effectiveness, indicating it is not entirely successful but not entirely without merit. Ludwig AI confirms its proper usage in describing treatments or procedures that don't always produce the desired outcome. Predominantly found in formal and scientific contexts, the phrase is essential for accurately communicating the performance of interventions in medicine and research. When a more informal tone is more appropriate consider alternatives like "has limited effectiveness" or "has modest efficacy".
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
has limited effectiveness
This alternative directly replaces "efficacy" with "effectiveness", maintaining the same meaning but offering a slight variation in word choice.
has limited potency
Swaps "efficacy" for "potency," suggesting a reduced strength or capacity to produce a desired effect.
has limited impact
Replaces "efficacy" with "impact," focusing on the restricted influence or effect of something.
has limited usefulness
Substitutes "efficacy" with "usefulness", highlighting the restricted practical value or utility.
has limited efficiency
Uses "efficiency" instead of "efficacy", emphasizing the restricted ability to avoid wasting materials, energy, efforts, money, and time in doing something or in producing a desired result.
has modest efficacy
Replaces "limited" with "modest," softening the statement while still indicating a less-than-ideal level of effectiveness.
offers only marginal benefit
This alternative shifts the focus to the benefit provided, describing it as "marginal", which implies it is small or insignificant.
is of questionable value
This phrase suggests that the value or worth of something is uncertain or doubtful, implying a limited positive effect.
is not particularly effective
This option offers a more descriptive assessment of the effectiveness, stating that it is not "particularly" effective.
fails to provide a substantial benefit
This longer phrase emphasizes the lack of a significant positive outcome, highlighting the inadequacy of the benefit.
FAQs
What does "has limited efficacy" mean?
The phrase "has limited efficacy" means that something, such as a treatment or intervention, is not very effective or does not work well in all situations. It implies that the treatment may provide some benefit, but its overall impact is restricted.
What are some alternatives to "has limited efficacy"?
You can use alternatives like "has limited effectiveness", "has limited impact", or "has modest efficacy" depending on the context.
How do I use "has limited efficacy" in a sentence?
You can use "has limited efficacy" to describe a treatment or intervention that does not work well or is not very effective. For example: "The drug has limited efficacy in treating this particular type of cancer."
Is "has limited efficacy" formal or informal?
The phrase "has limited efficacy" is generally considered formal and is often used in academic, scientific, and professional contexts. In informal settings, you might use phrases like "doesn't work very well" or "isn't very effective."
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
83%
Authority and reliability
4.5/5
Expert rating
Real-world application tested