796. Uterine relaxants (tocolytics), magnesium sulfate is the treatment of choice to suppress preterm labor (<37 weeks of gestation), terbutaline, nifedipine, indomethacin are the 2nd choice after magnesium sulfate.
797. Tolterodine is a muscarinic receptor antagonist, relaxes urinary bladder to treat overactive bladder.
798. Estrogen and progestin combinations cause abdominal pain, bloating, chest pain, shortness of breath, headache, eye problems, and severe leg pain.
799. Increase arterial blood flow, and decrease venous blood flow in the penis leads to erection after sexual stimuli (viagra). Erection lasts 4-6 hours (priapism), sildenafil causes a headache, dyspepsia, nasal congestion, and rhinitis. Tadalafil (Cialis) erection last for 36 hours.
800. Drugs that might cause syncope are alcohol, antiparkinson drugs, diuretics , alpha and beta- blockers, vasodilators, nitrates, phosphodiesterase 5-inhibitors (sildenafil, tadalafil, and vardenafil).
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