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Clenbuterol is approved for use in some countries as a bronchodilator for asthma. [medical citation needed] Clenbuterol is a β 2 agonist with some structural and pharmacological similarities to epinephrine and salbutamol, but its effects are more potent and longer-lasting as a stimulant and thermogenic drug.
Many tricyclic antidepressants, tetracyclic antidepressants, antipsychotics, ergolines, and some piperazines like buspirone, trazodone, nefazodone, etoperidone, and mepiprazole antagonize α 1-adrenergic receptors as well, which contributes to their side effects such as orthostatic hypotension.
When combined with inhaled steroids, β adrenoceptor agonists can improve symptoms. [1] [2] In children this benefit is uncertain and they may be potentially harmful. [2]They should not be used without an accompanying steroid due to an increased risk of severe symptoms, including exacerbation in both children and adults. [3]
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Drugs with similar structures and biological activity are also banned because new designer drugs of this sort are always being developed in order to beat the drug tests. Caffeine, a stimulant known to improve performance, is currently not on the banned list. It was listed until 2004, with a maximum allowed level of 12 micrograms per millilitre ...
Rarer side effects may indicate a dangerous allergic reaction. These include: paradoxical bronchospasm (shortness of breath and difficulty breathing); skin itching, rash, or hives ( urticaria ); swelling ( angioedema ) of any part of the face or throat (which can lead to voice hoarseness ), or swelling of the extremities.
The most common side effects of these drugs that led to withdrawals were mental disturbances, cardiac side effects, and drug abuse or drug dependence. Deaths were associated with seven products. [85] Ephedra was removed from the US market in 2004 over concerns that it raises blood pressure and could lead to strokes and death. [86]
The association said that “one key question” taken up by the roundtable was whether ARIA was a temporary symptom of the new drug — much the way nausea and hair loss are side effects of ...