For B12 deficiency, a typical injection dose is 1,000 micrograms (mcg) once a week for 4 to 8 weeks, then monthly
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Other Side Effects Muscle pain (due to fasciculations) Increased intragastric pressure aspiration risk Increased intraocular pressure (contraindicated in glaucoma) Pharmacokinetics Routes: IV or IM Rapid metabolism by plasma pseudocholinesterase Not metabolized by acetylcholinesterase Key Parameters: Onset: 3060 seconds Duration: 610 minutes Half-life: 35 minutes Notes: Phase II block recovery may last 30 minutes or longer Duration depends on: Rate of receptor dissociation Plasma enzyme activity Drug Interactions Increase Duration of Action: Cholinesterase inhibitors (e.g., neostigmine , pyridostigmine ) Administration of neostigmine & pyridostigmine to patients to reverse non-depolarizing skeletal muscle blockade has been shown to cause profound reductions of plasma pseudocholinesterase activity for several hours duration (Mirakhur et al, 1982), an effect that can mechanistically account for the observed prolongation of succinylcholine effect by these cholinesterase inhibitors (Sunew & Hicks, 1978
It is safe for daily and long-term use
An oral, fertility-preserving option for men with low testosterone
Gels 9:117
