Sodium Alginate + Magnesium Alginate (Algicid) can get in the way of Metoprolol Tartrate if you take them close together, so the body may absorb less of the metoprolol. To avoid this, leave a gap of at least 2 hours between the two. Take your metoprolol at a different time from Algicid, and ask your doctor or pharmacist if you are not sure how to space the doses.
These medicines are often taken together with some care. Your doctor may change a dose, space them apart or check on you more often. Make sure your doctor and pharmacist know you take both.