Forteo injections are commonly used to treat osteoporosis and help strengthen bones by improving new bone formation. Taking Forteo for 3 months is generally considered safe if it has been prescribed by your doctor and you are being monitored regularly. In most people, Forteo is usually recommended for a maximum total duration of about 18 to 24 months during a lifetime, depending on the condition being treated and the doctor's advice. Many patients continue the injections safely for this period if they are benefiting from the treatment and not developing significant side effects. Common mild side effects can include nausea, leg cramps, dizziness, headache, or mild pain at the injection site, but these are usually manageable. It is important to take the medicine exactly as prescribed and attend regular follow-ups so your doctor can monitor your calcium levels, bone health, and overall response to treatment. Along with Forteo, maintaining a healthy diet rich in calcium and vitamin D, regular sunlight exposure, light exercise, and avoiding smoking or excess alcohol can further improve bone strength. However, if you develop severe bone pain, swelling, repeated vomiting, weakness, or dizziness, you should contact your doctor promptly. Do not stop or continue the injections for a longer duration without medical guidance, because the treatment plan may need adjustment depending on your bone density and overall health condition.