When exercising, your system helps you get oxygen from the air, and your system helps move the oxygen throughout your body.

check for the pregnancy rating of drug. if its class c or d see if other alternatives

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these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.