Journal of Pharmaceutical Research International

Tocolytics are the drugs that are used to prolong the time of child birth, for a short period - up to 2 days. If the labour starts too early during pregnancy also termed as preterm birth, which is supposed to be one of the major cause of neonatal mortality and  morbidity, all over the world. Administration of tocolytic agents can help in preterm labour to delay the preterm labour by 48 hours. Tocolytics temporarily slow the contractions and hence it is possible to transport the patient to a hospital, where specialized care can be provided to premature baby and also corticosteroids can be administered, which  help mature the baby’s lungs. Different class of drugs are studied as tocolytics. Beta-Adrenergic receptor agonists like Terbutaline, Ritodrine, Fenoterol, Metaproterenol, Hexoprenaline, Albuterol, Orciprenaline, Nylidrin. Calcium channel blockers like Nicardipine and Nifedipine. Magnesium Sulfate. Nonsteroidal anti-inflammatories or prostaglandin inhibitors like Indomethacin, and Oxytocin inhibitors like Atosiban were found effective in different studies with some side effects, are discussed here briefly. Some Nitrates, alcohol, Progesterone have also been tried with not much significant effect. Calcium channel blocker specially Nifedipine is most studied and found to be safer and effective for tocolysis. Individual uterine relaxant therapy should take into account  individual  differences in  metabolism and response to drugs.. Short term use of tocolytics has been proven more effective and safer than longer use of it for pre-term labour.