Beard hair is a genetic trait similar to the color of your eyes and hair. There are no medications to grow a beard.
Greetings Thank you for your question, this would be a Genetic problem in your family that you father and grandfather might have also experienced.You can consider to go for Beard Transplant surgery in the future.
Many young men want to accelerate their beard growth and ask about it. It takes age (genetic triggers which occur in family lines) so if you want to find out when your beard will grow out, you need to find out when your father or grandfather started to grow their beard. Hormones should have kicked in nicely by the time a man reaches 18 but he must wait out his genetics as hormone alone are not responsible for the onset of beard grown. Beard transplants can be done when the young man is a bit older (over 25) if the beard has not grown in yet
In general hair will grow on the face in the beard area last after reaching puberty and some men will not grow much facial hair till age 30 and above. Also, consider amount of facial hair that your father has and at what age he grew his facial hair and also males on you mother's side.