Zudena 100 mg is generally effective for 6 to 12 hours, with peak effects seen within 1-2 hours of taking the tablet. If you have concerns about its effectiveness or side effects, it's best to consult with a healthcare provider. The duration of effectiveness may vary based on individual health conditions, such as liver or kidney function, age, or other medications being taken. The peak effect is typically seen within 1-2 hours of taking the tablet. The effectiveness of a Zudena 100 mg tablet can vary between individuals based on factors like metabolism, overall health, and the presence of other medications or conditions.