I want to stop tropical minoxidil which I was using for my hair loss. I am gaining weight. So want to stop using. What will be adverse effect?

Hair loss. No adverse effect from stopping use of topical Minoxidil aside from hair loss. Weight gain is not reported as a side effect of Minoxidil in www.Epocrates.Com so be sure to focus on nutrition & physical activity as therapeutic options for your weight gain. You might want to check w/your family doc regarding your thyroid (although this is rarely explanation).