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Inderal (Propranolol) (INN) is a non-selective beta blocker mainly used in the treatment of hypertension. It was the first successful beta blocker developed. It is the only drug proven effective for the prophylaxis of migraines in children. Inderal (Propranolol) is available in generic form as Inderal (Propranolol) hydrochloride, as well as an AstraZeneca product under the trade names Inderal, Inderal LA, Avlocardyl, Avlocardyl retard, Dociton, Inderalici, InnoPran XL, Sumial (depending on marketplace and release rate). It is also marketed by Wyeth.
Inderal (Propranolol) is a non-selective beta blocker, that is, it blocks the action of epinephrine on both ?1- and ?2-adrenergic receptors. It has little intrinsic sympathomimetic activity (ISA) but has strong membrane stabilizing activity (only at high blood concentrations, eg overdosage). Only L-Inderal (Propranolol) is a powerful adrenoceptor antagonist, whereas D-Inderal (Propranolol) is not. However, both have local anesthetic effect.
Inderal (Propranolol) is rapidly and completely absorbed, with peak plasma levels achieved approximately 1–3 hours after ingestion. Co-administration with food appears to enhance bioavailability. Despite complete absorption, Inderal (Propranolol) has a variable bioavailability due to extensive first-pass metabolism. Hepatic impairment will therefore increase its bioavailability. The main metabolite 4-hydroxyInderal (Propranolol), with a longer half-life (5.2–7.5 hours) than the parent compound (3–4 hours), is also pharmacologically active.
Inderal (Propranolol) is a highly lipophilic drug achieving high concentrations in the brain. The duration of action of a single oral dose is longer than the half-life and may be up to 12 hours, if the single dose is high enough (e.g., 80 mg). Effective plasma concentrations are between 10–100 ng/mL.
Toxic levels are associated with plasma concentrations above 2000 ng/ml
What is the shelf life of the pills?
- The expiry date is mentioned on each blister. It is different for different batches. The shelf life is 2 years from the date of manufacture and would differ from batch to batch depending on when they were manufactured.
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