 [ Symptoms ] my hubby has severe insomnia and has been taking 10 mg a night for sleep aid what is the most that he can take a nite  i am giving him 10 mg and 5 mg sustained release every nite i saw that he can take up 20 mg however can he take more then that and still be safe dosage [ Disease ] 10 mg of what you failed to mention what he is taking a very important fact please re post your question with more information including the age and weight of your husband 10 night melatonin and 5 night sustained release melatonin he takes every night