Which medications are okay before prp injection?

PRP protocols are still evolving, but before any type of injections such as PRP or fillers, etc..., one should avoid any medications that thin the blood, block platelet action, or  interfere with the coagulation profile to minimize the chance of bruising/hematoma formation.

See your doctor for a proper exam and medical history. There are no studies or protocols based on medication use and PRP treatments.

You can take Tylenol for pain, but avoid all anti-inflammatory medications such as aspirin, Advil, Ibuprofen as well as any blood thinning agents such as Vitamin E, Vitamin A, ginko, garlic, flax, cod liver oil 7 days prior to your procedure. Also any multivitamins should be avoided. Marijuana, smoking, and alcohol should be avoided 3 days prior to PRP. 

There is no study showing any one drug prevents the hair promoting effects of PRP. Having said that,  it is widely thought that anti platelet medications,  like aspirin or NSAIDS might reduce its effects,  but this has never been proven.  I do not restrict the medications my patients with PRP are on.