Before taking alendronate/vitamin D3, tell your doctor or pharmacist if you are allergic to it; or to other bisphosphonates; or to other vitamin D products; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: disorders of the esophagus (such as esophageal stricture or achalasia), trouble swallowing, trouble standing or sitting upright for at least 30 minutes, low calcium levels, kidney problems, stomach/intestinal disorders (such as ulcers).

Some people taking alendronate/vitamin D3 may have serious jawbone problems. Your doctor should check your mouth before you start this medication. Tell your dentist that you are taking this medication before you have any dental work done. To help prevent jawbone problems, have regular dental exams and learn how to keep your teeth and gums healthy. If you have jaw pain, tell your doctor and dentist right away.

Before having any surgery (especially dental procedures), tell your doctor and dentist about this medication and all other products you use (including prescription drugs, nonprescription drugs, and herbal products). Your doctor or dentist may tell you to stop taking alendronate before your surgery. Follow all instructions about stopping or starting this medication.

This drug is not recommended for use in children. Studies have shown that many children who took this drug had severe side effects such as vomiting, fever, and flu-like symptoms.

Tell your doctor if you are pregnant or plan to become pregnant. Alendronate may stay in your body for many years. You should not become pregnant while using this medication. Discuss the risks and benefits with your doctor.

Cholecalciferol (vitamin D3) in this medication passes into breast milk. It is unknown if alendronate passes into breast milk. Consult your doctor before breastfeeding.