Nimodipine is a medicine used to treat and prevent further damage to the brain after bleeding around the brain (subarachnoid hemorrhage or SAH). It is known as a calcium channel blocker and helps to improve blood flow to the brain and prevent changes in brain function. Nimodipine is usually started as soon as possible after bleeding around the brain (or SAH) is confirmed by the doctor. The exact dose and frequency will be decided by your doctor depending on your medical condition and response to treatment. It may be taken empty stomach or with a meal, but take it regularly as per your doctor’s instructions, to get the most benefit. Do not take any antacids for 2 hours before or after taking Nimodipine as this can prevent the medicine from working properly. Do not stop taking this medicine without first consulting your doctor. Your condition may worsen if this medicine is stopped too soon.