Hi, Eritel 40 is Telmisartan which is angiotensin receptor blocker in therapeutic class acts an antihypertensive medications. It is effective in reducing the risks of heart attacks, heart conditions, stroke and even death. It has some side effects like dizziness, increased heart rate, changes in vision, difficulty in micturition, back pain, muscle pain, sinus pain and congestion, diarrhea, abdominal pain, headache etc. Biselect 5 mg is an antihypertensive medication which is used alone or in combination with other medications to treat hypertension, angina, heart failure, heart attacks etc. There are some side effects too. Among them most common are cold extremities, fatigue, diarrhea, abdominal pain, dizziness, nausea, headache, depression, slow heart rate, hypotension, impotence, shortness of breath etc. Any anti hypertensive can be taken to continue for lifelong. Discontinuing antihypertensive medication may be possible among patients with hypertension which is well controlled for at least one year. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Zubayer Alam, General and Family Physician,