Pharmacology Drugs: Chapter 18⇒ [Central-acting alpha agonist]: Clonidine


Drug Class
Classification: selective alpha2 adrenergic agonist
Pregnancy Category: C

tablets should not be used in patients with known hypersensitivity to clonidine

Drug-Food-Lab Interactions
Clonidine may potentiate the CNS-depressive effects of alcohol, barbiturates or other sedating drugs.

peaks:3 to 5 hours
half-life ranges:12 to 16 hours
half-life increases up to 41 hours in patients with severe impairment of renal function
40-60% of the absorbed dose is recovered in the urine as unchanged drug in 24 hours.
50% of the absorbed dose is metabolized in the liver.

Therapeutic Effects/Uses
treat hypertension

Side Effects
drowsiness, dizziness;tired or irritable;runny or stuffy nose, sneezing, cough, sore throat;mood changes; insomnia; nightmares;
headache, ear pain;mild fever;
constipation, diarrhea,dry mouth, increased thirst; loss of interest in sex, impotence, difficulty having an orgasm.

Adverse Reactions
tachycardia, tremors;
bradycardia; feeling short of breath,
swelling, rapid weight gain;
confusion, hallucinations;
flu symptoms; urination problems;

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