How do I prevent 5% minoxidil liquid from crystalizing if I buy in bulk, i.e. 2 or 3 month supply?

FDA approved doses of minoxidil don't crystallize, unless left open or evaporate. If you purchase non FDA approved compounds, crystallization becomes an issue with various compounds. Stick with FDA approved formulations and this will be a non issue  

Thank you for posting your question. Normally, the only time I have seen monoxidil crystalizing  is when it is being compounded through a pharmacy. When being bought in bulk, over the counter you should be fine as long as the medication is not expired and is placed in room-temperature. Hope this helps.