Ritodrine is used in preterm labor.

Ritodrine relaxes the muscles of the uterus and prevents preterm delivery.

Tremor, Tachycardia

• Caution is to be used if you are suffering from cardiac diseases, hypertension, hyperthyroidism, hypokalemia and diabetes mellitus.
• High doses of ritodrine might cause hypokalemia in patients taking corticosteroids, diuretics (acetazalamide, loop diuretics and thiazides) or theophylline. 
• Your blood pressure and pulse rate may be monitored while on ritodrine treatment.
• Avoid over-hydration while taking ritodrine.
• Stop taking this medicine and you may advised to use ?–blocker as an antidote in case of drug overdose.

Ques. Q. What is Ritodrine?
Ritodrine is a 2-adrenergic agonist

Ques. Q. What it is used for?
It is used in in treatment of uncomplicated premature labour.