rifampicin(out) + H(+)(in) => rifampicin(in) + H(+)(out)
rifampicin(out) + h(+)(in) => rifampicin(in) + h(+)(out)
rifampicin(out) + H(+)(in) => rifampicin(in) + H(+)(out)
rifampicin(out) + h(+)(in) => rifampicin(in) + h(+)(out)