Tell the doctor or pharmacist if the patient is taking, has recently taken or might take any other medicines, including medicines obtained without prescription.
In particular, tell the doctor or pharmacist if the patient is taking any of the medicines listed as follows, as Defal might interact with them.
Diabetes medicines: as the dose might need to be changed.
Antibiotics (rifampicin): as they may reduce the effect of Defal.
Oestrogens or oral contraceptives: as the effect of Defal may be increased.
Medicines that cause muscle relaxation: as the relaxant effect may be prolonged.
Anticholinesterase medicines used in myasthenia gravis.
Vaccines and toxoids: as corticosteroids decrease the immune response.
Medicines for epilepsy and those used in psychiatric treatments (phenytoin, phenobarbital): as they may decrease the effect of Defal.
Some medicines may increase the effects of Defal 6 mg tablets and the doctor may wish to monitor the patient carefully if he/she is taking these medicines (including some medicines for HIV: ritonavir, cobicistat).