Taking your Telsartan 40 (telmisartan) on an empty stomach is generally perfectly fine, as this medication can be taken with or without food. However, swallowing it with black coffee while fasting might irritate your stomach or make you feel a bit dizzy. To keep you feeling your best, I highly recommend taking your tablet with a full glass of water instead. You can enjoy your black coffee shortly afterward. Please ensure you stay well-hydrated during your fast, and let your doctor know if you feel lightheaded.

Taking the wrong medication can temporarily disrupt your body's natural blood pressure regulation, causing these fluctuations as the drug is processed. Anxiety about the mistake can also worsen these swings. To stabilize your pressure safely, do not take additional corrective medications on your own, as this can cause dangerous drops. Instead, rest in a calm environment and stay hydrated. Because a reading of 190/100 mmHg is quite high, please seek immediate medical evaluation. Bring the incorrect medication package with you so healthcare professionals can identify it and safely guide your recovery, sometimes utilizing specific, temporary treatments if needed.