While most people tolerate it well and have no issues, there are a variety of side effects of strontium that can affect those taking it to strengthen their bones. The most common complaints are gastrointestinal upset and headache. Some people may be allergic to strontium, though it is fairly rare, but in these cases, users can get a rash, hives, or have swelling in the mouth and throat. It can also increase the risk of kidney problems and blood clots, so people with kidney disease or clotting disorders should talk to a doctor before taking strontium, or not use it at all. Strontium should also be avoided by pregnant or breastfeeding women, children, and those taking certain medications.
The most common side effects of strontium are typically not very serious and often are mild. Many people complain of some type of gastrointestinal discomfort such as nausea or stomach pain, and it may be accompanied by diarrhea or vomiting. Another common issue that users experience is a mild headache.
More rarely, the side effects of strontium can include a severe allergic reaction to the supplement. People with this problem may develop irritation and itching, rash, or hives on their skin. They may find their tongue, lips, or throat swelling. This type of reaction can be very dangerous, so anyone who develops these symptoms after taking strontium should call a doctor right away.
Strontium can also have a negative effect on the kidneys. The kidneys remove waste from the blood, and as they filter out excess strontium, the substance can have a tendency to accumulate in the kidneys, particularly if the person has decreased kidney function. Those with kidney disease should use strontium with caution and under a doctor’s supervision; in advanced cases, it should probably be avoided altogether.
Another of the potentially serious side effects of strontium is an increased chance of developing blood clots. This is primarily considered a risk for those who have a certain blood disorder that makes clotting more likely, or for those who have a history of blood clots. People with these issues should typically not take strontium.
Though they may not necessarily develop side effects, certain groups are usually not recommended for strontium use. It is uncertain if the supplement is safe for pregnant women, breastfeeding mothers, or children, and so they are typically told to avoid it. The effectiveness of oral tetracyclines and quinolone antibiotics can be decreased by taking strontium, so people taking these drugs should usually not take it either.