Q. All of the following are true regarding penicillins EXCEPT (Solved)

1. Most penicillins only cross the blood brain barrier when the meninges are inflamed.

2. Penicillins don’t require dosage adjustment in renal failure

3. Penicillins inhibit cross linkage of peptidoglycans in the cell wall

4. Piperacillin is a penicillin active against pseudomonas

5. Only about 5 to 10% of people with a past history of penicillin allergy have a reaction on re exposure