Eflornithine creams target facial hair growth at the follicular level by inhibiting an enzyme that is necessary for hair growth. This topical prescription treatment is specifically used to slow down the growth of unwanted facial hair in women, providing an alternative or supplement to physical hair removal techniques like threading or waxing. Regular application of eflornithine cream can visibly reduce and slow the growth of facial hair, making it a convenient option for long-term facial hair management.