22 • In certain serious infections, your doctor may consider to use Tygacil in combination with other antibiotics. • Tell your doctor if you are taking certain medicines (named anticoagulants) aimed at avoiding an excess of blood clotting (see also Using other medicines in this leaflet). • Tell your doctor if you are taking the contraceptive pill as you may need an additional method of contraception while receiving Tygacil (see also Using other medicines in this leaflet). • Tell your doctor if you have, or previously had liver problems.