Beta blockers: Can they cause weight gain?

Weight gain can occur as a side effect of some beta blockers.

Beta blockers are used to treat a variety of conditions, including high blood pressure and migraines. The exact cause of weight gain associated with beta blockers typically isn't known. But it usually occurs with long-term use of beta blockers. Also, if you switch from a diuretic to a beta blocker, you may gain a few pounds of weight that the diuretic kept off.

It is important to note that weight gain may also be due to fluid retention, which may indicate worsening heart failure. Talk to your doctor if you experience unexplained weight gain soon after starting a beta blocker — especially if you gain more than three to four pounds. If you have sudden weight gain — a weight gain of three to four pounds in 24 to 48 hours — consult your doctor promptly.