Eagle Hemp CBD Gummies Penile augmentation entails injecting fats cells into the penis or grafting fats cells onto the penis. Injecting fat cells into the penis could cause swelling and deformity; in some situations, removing of the penis could also be needed. Grafting fat cells onto the penis could be effective; nonetheless, the increase in size may disappear over time. Vitamin B6 , when used for a year or more at high doses, may cause extreme nerve damage. Vitamin B6 also can reduce the effectiveness of the anti-seizure drug Dilantin and levodopa (used to deal with Parkinson's disease).