It's impossible to say definitively which MS medication is the safest because every person responds differently to treatment, and each medication has its own potential side effects.
The best way to determine the safest and most effective MS medication for you is to work closely with your doctor. They will consider your individual medical history, current health status, and lifestyle to make a personalized recommendation.
Some medications, like Tecfidera, have generally been considered to have a good safety profile, but it's essential to remember that side effects can vary. Your doctor can help you weigh the potential risks and benefits of each medication and choose the one that best suits your needs.