Another procaine formulation similar to Gerivital is KH3, which is a gelatin capsule containing procaine and hematoporphyrin. Hematoporphyrin boosts the procaine action. It is claimed to help alertness, concentration, and recall as well as improve a number of health problems. The benefits are attributed to improved circulation to the brain. The only state where KH3 is sold legally is Nevada. It is also available over the counter in Europe.