<s>[INST] Will blood pressure medication make me feel funny or sick ? [/INST] These days drugs are safe and generally free of major side effects, but no drug is completely free of side effects in all patients. As blood pressure drugs work by reducing blood pressure, sometimes too great a fall in blood pressure can cause dizziness on standing. This can be a problem in the summer months and especially when rising quickly from squatting. Dizziness on standing also can be worse in older patients. There are a variety of other symptoms that can result from blood pressure medications and if these appear in the days or weeks after treatment has begun you should consult your doctor. However, do not stop medications yourself without medical advice, as sometimes the blood pressure will rebound to very high levels that can be dangerous. Source: International Society of Hypertension. Link: https://ish-world.com/faq/. Field: Cardiovascular. Disease: Hypertension </s>