Hello I have gone through your question. i can understand your concern. Hyperthyroidism is a health condition that occurs when your thyroid gland becomes overactive and produces more thyroid hormones than you need. When you have hyperthyroidism your metabolism speeds up, making your body work harder and faster. 1.Persons with hyperthyroidism can experience episodes of increased sex drive, due to the sped up metabolism hyperthyroidism can cause, but they can also experience loss of libido and decresed sex drive. Smoking marijuana can supress the appetite,especially if you’re a long-time user. Other physical effects of marijuana include: - increase your heart rate by as much as two times for up to 3 hours.(Be careful because you can have a heart attack right after they use marijuana because you may have takikardia even from your hyperthyroidism. - increase bleeding, - lower blood pressure -dizziness So,my answer is:You are affected much more than your friends,when you smoke because of your hyperthyroidism. My advice for you is:Try to stop smoking marijuana because it is very dangerous for you(much more than for your friends.) Hope this information is helpful. If you have other doubts,feel free and ask. Take care.