<s>[INST] Can I take nasal decongestants if I have high blood pressure? [/INST] Nasal decongestants can cause a rise in blood pressure when taken in high doses, but this shouldn’t happen with normal doses. Using them excessively can cause problems, especially with the sprays, so see the packet for the doses recommended by the manufacturer.You could measure your blood pressure once or twice after taking one of your nasal decongestant treatments. If your blood pressure is okay then it’s fine to keep on using the decongestants while you have a cold, then stop once it's cleared up.If you have nasal problems even when you don’t have a cold, it is worth seeing your GP to have it checked out. They can refer you to an ear, nose and throat specialist if needed to find the cause of the problem. Source: Blood Pressure UK. Link: https://www.bloodpressureuk.org/resources/frequently-asked-questions/#d.en.819873. Field: Cardiovascular. Disease: Hypertension </s>