Herz Drug Interactions

Always tell the doctor which medicines or herbal products the patient is already using. There are some medicines the patient must not take with HERZ. Also tell any other doctor or dentist who prescribes another medicine (or the pharmacist from whom the patient got the medicine) that she is taking HERZ. They can tell the patient if she needs to take additional contraceptive precautions (for example condoms) and if so, for how long, or, whether the use of another medicine she needs must be changed.
Some medicines: can have an influence on the blood levels of HERZ; can make it less effective in preventing pregnancy; can cause unexpected bleeding.
These include: medicines used for the treatment of: Epilepsy (e.g. primidone, phenytoin, barbiturates, carbamazepine, oxcarbazepine, topiramate, felbamate); tuberculosis (e.g. rifampicin); HIV and Hepatitis C Virus infections (so-called protease inhibitors and non-nucleoside reverse transcriptase inhibitors); fungal infections (griseofulvin, azole antifungals, e.g. itraconazole, voriconazole, fluconazole, ketoconazole); bacterial infections (macrolide antibiotics, e.g. clarithromycin, erythromycin); certain heart diseases, high blood pressure (calcium channel blockers, e.g. verapamil, diltiazem); arthritis, arthrosis (etoricoxib); the herbal remedy St. John's wort; grapefruit juice.
HERZ may influence the effect of other medicines, e.g. cyclosporine, lamotrigine, melatonin, midazolam, theophylline, tizanidine.
In theory the potassium levels may increase if the patient is taking HERZ with other drugs that can also increase potassium levels.
Please tell the doctor or pharmacist if the patient is taking or has recently taken any other medicines, including medicines obtained without a prescription.
Laboratory tests: If the patient needs a blood test or other laboratory tests tell the doctor or the laboratory staff that she is taking the Pill because oral contraceptives can affect the results of some tests.
Taking HERZ with food and drink: The patient may take HERZ with or without food, if necessary with a small amount of water.