Any of the pairs of nucleotides connecting the complementary strands of a molecule of DNA or RNA and consisting of a purine linked to a pyrimidine by hydrogen bonds. The base pairs are adenine-thymine and guanine-cytosine in DNA, and adenine-uracil and guanine-cytosine in RNA or in hybrid DNA-RNA pairing. Base pairs may be thought of as the rungs of the DNA ladder.
Drugs used to prevent migraines include: 1  Anticonvulsants, such as topiramate. 2  AntidepressantsAntidepressants, such as amitriptyline. 3  Antihistamine , such as cyproheptadine.  Beta-blockers, such as 1  propranolol. Botulinum toxinBotulinum toxin, such as Botox.  Calcium channel blockers, such as 1  verapamil. Histamine.
Recommended Related to Pain Management. Use Preventive Meds. If migraines are frequent or interfere with your life, it may be time to discuss prevention with your doctor. Preventive medications can help stop migraines or reduce their intensity.See if they might help you.ecommended Related to Pain Management. Use Preventive Meds. If migraines are frequent or interfere with your life, it may be time to discuss prevention with your doctor. Preventive medications can help stop migraines or reduce their intensity. See if they might help you.