Hi. I am prescribed norteiptyline/allegron 200 mg in the evening. I've read mixed opinions stating that multivitamins can cause tricyclics anti depressants to not work to their full potential. Just wondering if anyone can give me any other information on this. I want to take the multivitamin as I'm very overweight and unhealthy I don't eat any vegetables. I am in the process of losing weight. Any advice is appreciated thank you.