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PubMedDate not supplied

Treatment of "permanent" muscle weakness in familial Hypokalemic Periodic Paralysis.

Three patients with Hypokalemic Periodic Paralysis (HOPP)-associated progressive interattack muscle weakness, who became unresponsive or worsened by acetazolamide, responded favorably to dichlorophenamide, a more potent carbonic anhydrase inhibitor. Dichlorophenamide in single-blind placebo-controlled trials, considerably improved functional strength in two of the patients and had a moderate but definite effect in the third. Muscle groups graded 4/5 (MRC scale)returned to normal; very weak (0-3/5) atrophic muscles, improved to a minor degree. In one patient with acetazolamide-resistant paralytic attacks, dichlorophenamide also diminished the frequency and severity of the acute attacks. Dichlorophenamide had, in the present study, less effect than acetazolamide in reducing serum HCO3(-) and elevating Cl-. Its effectiveness may be related to the degree of sensitivity of certain HOPP patients to alterations of Cl- and/or HCO3(-) serum levels or to a different action of the drug unrelated to carbonic anhydrase inhibition or acidosis. Dichlorophenamide should be considered as an alternate to acetazolamide in the treatment of patients with HOPP-associated interattack muscle weakness who have become unresponsive or worsened by acetazolamide.

Adult↗
PubMed1985

Hematologic reactions to carbonic anhydrase inhibitors.

The National Registry of Drug-Induced Ocular Side Effects has received 79 case reports of suspected hematopoietic toxicity caused by carbonic anhydrase inhibitors. Twenty-six of these suspected cases (32%) resulted in death secondary to aplastic anemia, thrombocytopenia, or agranulocytosis. In 54 of these 79, adverse reactions (68%) occurred during the first six months of therapy.

Acetazolamide↗
PubMed1991

Hyperkalaemia induced by carbonic anhydrase inhibitor.

An 81-year-old man developed hyperkalaemic and hyperchloraemic metabolic acidosis following treatment with a carbonic anhydrase inhibitor for his glaucoma. He had mild renal failure and selective aldosterone deficiency was confirmed. In this case the treatment did not lead to hypokalaemia because of the limited potassium secretory capacity in the renal tubules from selective aldosterone deficiency; rather, it may have led to hyperkalaemia because metabolic acidosis induced by the carbonic anhydrase inhibitor caused transcellular movement of potassium.

Acidosis↗
PubMed1984

Metabolic acidosis induced by carbonic anhydrase inhibitors and salicylates in patients with normal renal function.

Two young patients with unimpaired renal and hepatic function were found to have developed metabolic acidosis after treatment for glaucoma and joint pain with a combination of salicylates and carbonic anhydrase inhibitors in normal doses. Carbonic anhydrase inhibitors appear to interact with salicylates to produce serious metabolic acidosis in patients without the predisposing factors generally considered to constitute risks. It is recommended that treatment combining salicylates and carbonic anhydrase inhibitors is either kept to a minimum or avoided.

Acetazolamide↗