medicine must be taken as needed, once a day or as it has been prescribed by a physician. A dose of mg is taken by mouth taking plenty of water after your medicine.Product Summary. FDA-Approved Generic Atenolol; PRESCRIPTION REQUIRED; See Instructions Below; IMPORTANT: HOW TO USE THIS INFORMATION: This is a summary and does NOT have all possible information about this product.Bromocriptine - Active Ingredient: Bromocriptine: Manufacturer: Novartis: Bromocriptine is classified as a dopamine agonist drug that lowers prolactin levels.