Flunarizine hydrochloride capsules and calcium can be taken together, there is no drug interaction between the two. Flunarizine hydrochloride capsule is a calcium antagonist, for cerebrovascular disease caused by headache, dizziness, vertigo and other symptoms have a better efficacy, can be used as a vasodilator in the cerebral blood supply is insufficient, vertebral artery ischemia, cerebral thrombosis, the prevention of migraines, as well as to play the role of antiepileptic effect, etc., there is no interaction with the calcium dose, but it is best to interval of more than half an hour. Long-term use of flunarizine hydrochloride, some patients may develop depression; allergic to flunarizine, cinnarizine or other ingredients in the preparation is prohibited, history of depression, patients with extrapyramidal symptoms, patients with acute cerebral hemorrhagic disease is prohibited; patients should strictly control the dose of the drug, and the drug should be reduced or discontinued when there are symptoms of extravertebral system. Flunarizine hydrochloride capsule has sedative effect, after using the drug may feel body weakness, drowsiness, etc., during the use of the drug should not climb high, driving or operating machinery.