There are several drugs to control bp. Some times it is necessary to take 2 or more medicines to control your blood pressure. But important fact is blood pressure should be in control. Your doc has prescribed you a good combination of medicine and I think this time it will control your bp. If not you van increase the dose of benitec to 40 and take nebicard 5 at evening. Try to avoid excess salt in diet. Daily salt preferred to be 5-6 gm. Use regular moderate exercise approximately 25min a day. You can take on fruit rich in potassium like lemon. This will help to reduce your bp. Hope I could answer your queries. Wish you good health.