Telmikind H 80 contains telmisartan and a diuretic. Sometimes, diuretics can disrupt sleep by causing nighttime urination, compounding your tiredness. However, untreated sleep apnea itself is often the primary cause of daytime sleepiness and can make blood pressure harder to control. Instead of just switching blood pressure medication, the most helpful step is to address and treat the sleep apnea directly. This will greatly improve your energy levels and help lower your blood pressure. Please consult your doctor to discuss a sleep evaluation and see if adjusting to a medication without a diuretic is appropriate for you.