Hello my wife had a reaction to her previous inhaler √¢‚?¨‚?? she was using Singulair and an Atrovent Inhaler and she had some bad side effects. She went to her pulmonary doctor who took her off both these medications but put her n a powder inhaler - Spiriva- Handihaler. It is a twenty four hour thing and it comes in a powder form. We have never used this before and we'd just like to know how effective it is and the possible side effects. If anyone of you has used this drug can you give us some insight into how it works and what we should be careful about? Thank you.