Hi, For the last 5 years, my father was taking 1 Eritel 40 with BP remaining normal at 130/70. But, since a month, it is high at 170/100. Thankfully, with your advice, I started 1 Twintel 10/40 once daily. Now, the diastolic is about 75-80 but systolic always remain at borderline 140. Also, my father's age is 80 years with 53 kg. And, his sodium level is also low at 129. He also consumes potassium foods and hibiscus tea to lower BP. Kindly advise a remedy/medicine to lower the systolic BP. He also takes Urimax F daily. Thanks. Regards.