Both Zyrtec-D and Caffeine offer similar effectiveness, with differences in speed and duration of relief.

Zyrtec-D has fewer side effects and is less likely to interact with other medications.

Caffeine has a more stable effect and is less likely to lead to addiction over time.

Both drugs are easy to use, with clear dosing schedules to ensure treatment adherence.

Both drugs have some contraindications depending on individual health conditions, but neither has major restrictions.

Both drugs are good options depending on the patient’s needs, with Zyrtec-D better for quick relief and Caffeine for long-term management.