So I have Bronkaid (25mg ephedrine sulfate/400mg guaifenesin), and I'm looking to get speedy effects from it. Today I took 2 pills with 200mg caffeine and felt minimal effects. I want to take 3...how many am I safe to take? Also, why didnt I feel the 50mg? I've heard primatene is stronger, can anyone make a personal testimony to this? Thanks alot, appreciate any info.