The time it takes for medication to take effect after taking urticaria medication is usually from several hours to several days, depending on the individual. It is recommended to use medication as directed by a doctor and to cooperate with daily care to promote recovery.

1. **The type of medication affects the speed of its effectiveness.**

Antihistamines such as loratadine and cetirizine usually provide symptom relief within 1-2 hours after administration. The onset time may vary slightly with other types of medications (such as hormones), and patients should be monitored for their response as directed by their doctor.
2. **Severity of illness and individual differences in physical condition**
Mild urticaria may show significant improvement on the day of medication use; however, patients with recurrent or severe symptoms may require several days or even longer of continuous medication to achieve control. Furthermore, the body's sensitivity to the medication will also affect the speed of effectiveness.
3. **Medication administration and precautions**
Taking medication on time and in the correct dosage is crucial; do not increase or decrease the dosage on your own. If symptoms do not improve or worsen after 3 days of medication, consult a doctor promptly to adjust the treatment plan. Avoiding scratching the skin and keeping a record of potential triggering factors (such as food, environment, etc.) can help improve the effectiveness of treatment.
Final advice: Be patient during treatment and avoid frequent changes in medication. Wear loose cotton clothing and use mild bath products to reduce skin irritation. If flare-ups recur, it is recommended to keep a diet and activity log to help your doctor accurately determine the cause and develop a long-term management strategy.