Taking metoprolol with other medicines and herbal supplements

Cautions with other medicines

There are some medicines that may affect the way metoprolol works.

Tell your doctor if you're taking:

• other medicines for high blood pressure (hypertension) – the combination with metoprolol can sometimes lower your blood pressure too much, which may make you feel dizzy or faint. Tell your doctor if this keeps happening as they may change your dose
• other medicines that can lower your blood pressure and cause hypotension – these include some antidepressants, nitrates (for chest pain), baclofen (a muscle relaxant), tamsulosin (for an enlarged prostate), and co-careldopa and levodopa (for Parkinson's disease)
• non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen – these medicines may increase your blood pressure, so it's best to keep them to a minimum
• cough medicines that contain pseudoephedrine or xylometazoline
• medicines for diabetes – metoprolol may make it more difficult to recognise the warning signs of low blood sugar
• medicines for allergies – such as ephedrine, noradrenaline or adrenaline
• medicines for asthma or chronic obstructive pulmonary disease (COPD)

Mixing metoprolol with herbal remedies and supplements

There's not enough information to say that herbal remedies and supplements are safe to take with metoprolol. They're not tested in the same way as pharmacy and prescription medicines. They're generally not tested for the effect they have on other medicines.