ScienceInsights

Vyvanse typically kicks in within 1–2 hours, but food, form, and individual factors can shift that window. Here's what to expect and when to talk to your doctor.

From lithium to risperidone, explore 10 commonly prescribed medications for bipolar disorder, including their uses, side effects, and treatment challenges.

Smelly urine isn't always about hydration. Foods, supplements, infections, and health conditions can all affect how your urine smells.

Learn the correct CPR compression-to-ventilation ratios for infants and children, including how ratios change with one or two rescuers.

True periods don't occur during pregnancy, but bleeding can. Learn what's behind period-like bleeding in early pregnancy and when to be concerned.

Humira can cause serious side effects including infections, certain cancers, and heart issues. Here's what patients should know about the risks and how doctors manage them.

Low blood pressure can cause dizziness, fainting, and fatigue, but symptoms vary widely and sometimes don't appear at all. Here's what to watch for.

Most 1-year-olds weigh between 17–25 lbs, but steady growth over time matters more than hitting an exact number.

Pneumonia recovery takes longer than most expect. Learn what healing looks like week by week, why fatigue lingers, and when to check back with your doctor.

Tingling, weakness, or digestive changes could be early signs of nerve damage. Learn what to watch for and when to see a doctor.