1st & 2nd Generation Antihistamines #nursingschool #RN #BSN

1st vs. 2nd Generation Antihistamines 🤧

Both:
- Available over the counter (OTC)
- Both antihistamines (block the effects of histamine, a substance released during allergic reactions)

1️st Generation Antihistamines:
- More side effects (Sedation & drowsiness since they cross the blood-brain barrier)
- Shorter duration (requires more doses throughout the day)

2️nd Generation Antihistamines:
- Fewer side effects (Sedation & drowsiness are less common because it does not readily cross the blood-brain barrier)
- Longer duration (Typically only 1 dose per day is needed)

Which generation of antihistamines does cetirizine fall into? 💊Answer below!

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