Viagra relaxes muscles found in the walls of blood vessels and increases blood flow to particular areas of the body.

Citalopram was approved for medical use in the United States in 1998. It is on the World Health Organization's List of Essential Medicines.

Clonidine lowers blood pressure by stimulating α2 receptors in the brain, which results in relaxation of many arteries.

SINGULAIR® (Montelukast sodium) is a drug for treating asthma, exercise-induced bronchoconstriction (EIB), and allergic rhinitis.

Finasteride, sold as PROSCAR®, is a 5α-reductase inhibitor mainly used to treat men with benign prostatic hyperplasia (BPH) symptoms with enlarged prostates.

Baclofen, sold under the brand name Lioresal among others, is a medication used to treat muscle spasticity such as from a spinal cord injury or multiple sclerosis.

Ciprofloxacin is a fluoroquinolone antibiotic used to treat a number of bacterial infections. It can be taken by mouth, as eye drops, as ear drops, or intravenously.

Diphenhydramine (DPH) is an antihistamine and sedative mainly used to treat allergies, insomnia, and symptoms of the common cold.

Tamsulosin was approved for medical use in the United States in 1997. Specifically it is an α1 adrenergic receptor blocker.

Methocarbamol, sold under the brand name Robaxin among others, is a medication used for short-term musculoskeletal pain.

Clindamycin was first made in 1966 from lincomycin and it is of the lincosamide class and works by blocking bacteria from making protein.

Levothyroxine Sodium is a small molecule drug that mimics and targets the thyroid hormone as an agonist.