I am planning to combine 4-FA with speed and/or ecstasy (MDMA). What are the consequences?

4-FA is a stimulant that can cause complaints on your cardiovascular system. This risk is increased by combining it with other stimulants such as speed or MDMA. The effects reinforce each other and because 4-FA continues to work for a long time, you increase the risk of unpleasant side effects and risks such as: tight jaws, muscle tension, heart palpitations, pressure on the chest, sleeping problems, a strong hangover and hangover the days after. You are also more likely to suffer from severe headaches.