Smoking causes the opposite to happen. A number of asthma medications have theophylline in them or are similar to theophylline. While taking it, be sure to read any directions that come with your asthma medication before smoking. In fact, any time we are taking a medication for asthma or breathing problems of any kind, we should not smoke. Smoking cigarettes causes our blood vessels to narrow.
Smoking can also cause our blood pressure to go up.
If we're taking medication for high blood pressure, smoking will make our situation worse. If we are taking medications for heart disease, smoking will just make it harder for the medication to do its job. Always read the instructions on any medication label. A pharmacist can answer any questions you might have about smoking and taking medications. If you are concerned about your smoking, ask your healthcare provider for some information about quitting.