Sintralyne-PM is an over the counter dietary supplement provided in a gel capsule. It is used to treat insomnia and provide more restful sleep. This sleep aid contains the active ingredients Melatonin and Gamma-Aminobutyric Acid (GABA) and a proprietary blend of herbal extracts and amino acids. The sedative effect of these natural ingredients is non-addicting, and a less harsh and safer alternative. The herbal ingredients Hawthorn Berry, Kava-Kava (Piper Methysticum), Chamomile Flower, Lemon Balm (Melissa Officinalis), Valerian, Passion Flower and L-Tryptophan have been used for centuries to provide a calming effect.