Becoming a cardholder is the only legal way to buy and possess marijuana in Pennsylvania. If you have a qualifying medical condition and a doctor issues you an MMJ certificate, there is always the chance that medical marijuana may not help your symptoms. Due to differences in biochemistry, cannabis affects people differently.
The best way to decide if cannabis is right for you is to consult a qualified doctor. Explaining the nature of your condition and how your symptoms impact your life will help the doctor make the right recommendation. Then, your dispensary pharmacist can offer guidance about dosing, strains, and consumption methods.
You should also be aware that you are prohibited from possessing firearms in Pennsylvania if you are a medical marijuana cardholder. Also note that if you rent your home, your landlord is under no legal obligation to allow medical marijuana use on their property.